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Q. If a person lifts a 10 kg object to a height of 5 m in 2 seconds, what is the power exerted?

A. 25 W
B. 50 W
C. 75 W
D. 100 W

Solution

First, calculate the work done: W = mgh = 10 kg * 9.8 m/s² * 5 m = 490 J. Then, P = W/t = 490 J / 2 s = 245 W.

Correct Answer: B — 50 W

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Q. If a person lifts a 10 kg object to a height of 5 m in 5 seconds, what is the power exerted?

A. 100 W
B. 200 W
C. 300 W
D. 400 W

Solution

First, calculate the work done: W = mgh = 10 kg * 9.8 m/s² * 5 m = 490 J. Then, power is P = W/t = 490 J / 5 s = 98 W.

Correct Answer: B — 200 W

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Q. If a person lifts a 10 kg weight to a height of 2 meters in 4 seconds, what is the power exerted?

A. 50 W
B. 100 W
C. 200 W
D. 250 W

Solution

First, calculate the work done: W = mgh = 10 kg * 9.8 m/s² * 2 m = 196 J. Then, power is P = W/t = 196 J / 4 s = 49 W, approximately 50 W.

Correct Answer: B — 100 W

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Q. If a person lifts a 20 kg box to a height of 2 m, what is the work done against gravity? (g = 9.8 m/s²)

A. 392 J
B. 196 J
C. 588 J
D. 784 J

Solution

Work = m * g * h = 20 kg * 9.8 m/s² * 2 m = 392 J.

Correct Answer: B — 196 J

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Q. If a person lifts a 50 kg box to a height of 2 meters in 5 seconds, what is the power exerted?

A. 200 W
B. 400 W
C. 500 W
D. 600 W

Solution

The work done against gravity is W = mgh = (50 kg)(9.8 m/s²)(2 m) = 980 J. Power is P = W/t = 980 J / 5 s = 196 W, approximately 200 W.

Correct Answer: B — 400 W

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Q. If a person lifts a 50 kg object to a height of 2 meters in 5 seconds, what is the power exerted?

A. 200 W
B. 400 W
C. 500 W
D. 600 W

Solution

The work done is W = mgh = 50 kg * 9.8 m/s^2 * 2 m = 980 J. Power is W/t = 980 J / 5 s = 196 W, approximately 200 W.

Correct Answer: B — 400 W

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Q. If a person lifts a weight of 100 N to a height of 2 m in 4 seconds, what is the power exerted?

A. 50 Watts
B. 100 Watts
C. 200 Watts
D. 25 Watts

Solution

Work done = Force × Distance = 100 N × 2 m = 200 J. Power = Work / Time = 200 J / 4 s = 50 W.

Correct Answer: A — 50 Watts

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Q. If a person moves 5 km east and then 5 km south, what is his final position relative to the starting point? (2021)

A. 5 km North-East
B. 5 km South-East
C. 5 km South-West
D. 5 km North-West

Solution

The final position is 5 km South-East from the starting point.

Correct Answer: B — 5 km South-East

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Q. If a person needs 1500 mg of calcium daily and they consume 300 mg from one serving of yogurt, what percentage of their daily requirement is met by this serving? (2022)

A. 15%
B. 20%
C. 25%
D. 30%

Solution

Percentage = (300 mg / 1500 mg) * 100 = 20%.

Correct Answer: B — 20%

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Q. If a person needs 2500 calories a day and wants to get 20% of their calories from fats, how many grams of fat should they consume (1 gram of fat = 9 calories)?

A. 55 grams
B. 60 grams
C. 70 grams
D. 75 grams

Solution

20% of 2500 calories = 0.20 * 2500 = 500 calories from fats. 500 calories / 9 calories per gram = 55.56 grams, rounded to 56 grams.

Correct Answer: C — 70 grams

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Q. If a person needs 300 mg of calcium daily and a glass of milk provides 100 mg, how many glasses of milk must they drink to meet their daily requirement? (2020)

A. 2 glasses
B. 3 glasses
C. 4 glasses
D. 5 glasses

Solution

300 mg needed / 100 mg per glass = 3 glasses.

Correct Answer: B — 3 glasses

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Q. If a person needs 70 grams of fat per day and each gram of fat provides 9 calories, how many calories should they consume from fat?

A. 490 calories
B. 540 calories
C. 630 calories
D. 700 calories

Solution

70 grams * 9 calories/gram = 630 calories.

Correct Answer: A — 490 calories

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Q. If a person needs 70 grams of protein per day, how many grams of protein will they need in a week? (2019)

A. 420
B. 490
C. 350
D. 560

Solution

Weekly protein requirement = 70 grams/day * 7 days = 490 grams.

Correct Answer: A — 420

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Q. If a person reads 20 pages in 30 minutes, how many pages can he read in 2 hours?

A. 80 pages
B. 100 pages
C. 120 pages
D. 140 pages

Solution

Pages per hour = 20 pages / 0.5 h = 40 pages/h. In 2 hours = 40 pages/h × 2 h = 80 pages.

Correct Answer: B — 100 pages

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Q. If a person reads 20 pages in an hour, how many pages can he read in 4.5 hours?

A. 70 pages
B. 80 pages
C. 90 pages
D. 100 pages

Solution

Total pages = Pages per hour × Hours = 20 pages/h × 4.5 h = 90 pages.

Correct Answer: C — 90 pages

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Q. If a person requires 2500 calories a day and they want to get 20% of their calories from protein, how many calories should come from protein? (2023)

A. 400 calories
B. 500 calories
C. 600 calories
D. 700 calories

Solution

20% of 2500 = 0.20 * 2500 = 500 calories.

Correct Answer: B — 500 calories

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Q. If a person requires 2500 calories a day and they want to lose weight, how many calories should they consume to lose 1 pound per week? (1 pound = 3500 calories) (2020)

A. 2000
B. 2200
C. 1800
D. 2400

Solution

To lose 1 pound per week, they need to reduce their intake by 500 calories/day. So, 2500 - 500 = 2000 calories.

Correct Answer: C — 1800

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Q. If a person runs 10 km in 40 minutes, what is his speed in km/h? (2021)

A. 12 km/h
B. 15 km/h
C. 18 km/h
D. 20 km/h

Solution

Speed = Distance / Time = 10 km / (40/60) hours = 10 / (2/3) = 15 km/h.

Correct Answer: B — 15 km/h

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Q. If a person runs 10 km in 40 minutes, what is his speed in m/s? (2021)

A. 4.17 m/s
B. 5 m/s
C. 6 m/s
D. 7.5 m/s

Solution

Speed in m/s = (10 km * 1000 m/km) / (40 min * 60 s/min) = 10000 m / 2400 s = 4.17 m/s.

Correct Answer: A — 4.17 m/s

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Q. If a person runs 10 km in 50 minutes, what is his speed in km/h? (2020)

A. 10 km/h
B. 12 km/h
C. 14 km/h
D. 15 km/h

Solution

Speed = Distance / Time = 10 km / (50/60) hours = 10 km / (5/6) hours = 12 km/h.

Correct Answer: B — 12 km/h

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Q. If a person runs 10 km in 50 minutes, what is their speed in km/h?

A. 10 km/h
B. 12 km/h
C. 14 km/h
D. 15 km/h

Solution

Speed = Distance / Time = 10 km / (50/60) hours = 10 km / (5/6) = 12 km/h.

Correct Answer: B — 12 km/h

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Q. If a person saves $200 every month, how much will he save in a year?

A. $2000
B. $2400
C. $3000
D. $3600

Solution

Total savings = Monthly savings × Number of months = $200 × 12 = $2400.

Correct Answer: B — $2400

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Q. If a person saves 15% of his monthly income of $2000, how much does he save? (2000)

A. $300
B. $250
C. $200
D. $350

Solution

Savings = 15% of $2000 = 0.15 × 2000 = $300.

Correct Answer: A — $300

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Q. If a person saves 15% of his monthly salary and his monthly salary is $2000, how much does he save in a year? (2000)

A. $2400
B. $3600
C. $1800
D. $3000

Solution

Monthly savings = 15% of 2000 = 0.15 * 2000 = 300. Annual savings = 300 * 12 = 3600.

Correct Answer: B — $3600

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Q. If a person saves 15% of his monthly salary and his savings amount to $300, what is his monthly salary? (2000)

A. $2000
B. $2500
C. $3000
D. $3500

Solution

Let the monthly salary be x. Then 0.15x = 300, leading to x = 300/0.15 = 2000.

Correct Answer: A — $2000

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Q. If a person saves 15% of his monthly salary of $800, how much does he save?

A. $120
B. $100
C. $80
D. $60

Solution

Savings = 15% of $800 = 0.15 × 800 = $120.

Correct Answer: A — $120

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Q. If a person standing 30 m away from a building observes the top of the building at an angle of elevation of 60 degrees, what is the height of the building? (2023)

A. 15 m
B. 25 m
C. 30 m
D. 51.96 m

Solution

Height = distance * tan(60) = 30 * √3 ≈ 30 * 1.732 = 51.96 m.

Correct Answer: D — 51.96 m

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Q. If a person travels from 30 degrees North to 30 degrees South, how many degrees of latitude have they crossed?

A. 30 degrees
B. 60 degrees
C. 90 degrees
D. 120 degrees

Solution

The total distance crossed is 30 + 30 = 60 degrees of latitude.

Correct Answer: B — 60 degrees

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Q. If a person travels from 30° N to 30° S latitude, how many degrees of latitude have they crossed? (2023)

A. 30 degrees
B. 60 degrees
C. 90 degrees
D. 120 degrees

Solution

The total distance crossed is 30° N to the Equator (30 degrees) and then to 30° S (another 30 degrees), totaling 60 degrees.

Correct Answer: B — 60 degrees

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Q. If a person travels from 60° West to 30° East, how many hours ahead or behind will they be? (2023)

A. 5 hours ahead
B. 6 hours ahead
C. 7 hours behind
D. 8 hours behind

Solution

The total change in longitude is 60 + 30 = 90 degrees. 90/15 = 6 hours ahead.

Correct Answer: B — 6 hours ahead

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Major Competitive Exams

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