A person walks 4 km at a speed of 4 km/h and then runs 3 km at a speed of 6 km/h

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Question: A person walks 4 km at a speed of 4 km/h and then runs 3 km at a speed of 6 km/h. What is the total time taken? (2020)

Options:

Correct Answer: 1.5 hours

Exam Year: 2020

Solution:

Time walking = 4 km / 4 km/h = 1 hour; Time running = 3 km / 6 km/h = 0.5 hours. Total time = 1 + 0.5 = 1.5 hours.

A person walks 4 km at a speed of 4 km/h and then runs 3 km at a speed of 6 km/h. What is the total time taken? (2020)

A person walks 4 km at a speed of 4 km/h and then runs 3 km at a speed of 6 km/h. What is the total time taken? (2020)

Step 1: Identify the distance walked, which is 4 km.
Step 2: Identify the speed while walking, which is 4 km/h.
Step 3: Calculate the time taken to walk using the formula: Time = Distance / Speed. So, Time walking = 4 km / 4 km/h = 1 hour.
Step 4: Identify the distance run, which is 3 km.
Step 5: Identify the speed while running, which is 6 km/h.
Step 6: Calculate the time taken to run using the same formula: Time = Distance / Speed. So, Time running = 3 km / 6 km/h = 0.5 hours.
Step 7: Add the time walking and time running to find the total time. Total time = 1 hour + 0.5 hours = 1.5 hours.

Speed, Distance, and Time – Understanding the relationship between speed, distance, and time, and how to calculate time taken for different segments of a journey.