A train takes 2 hours to travel 120 km. If it increases its speed by 20 km/h, ho

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Question: A train takes 2 hours to travel 120 km. If it increases its speed by 20 km/h, how long will it take to travel the same distance?

Options:

Correct Answer: 1.5 hours

Solution:

New speed = 120 km / 2 h + 20 km/h = 60 km/h + 20 km/h = 80 km/h. Time = 120 km / 80 km/h = 1.5 hours.

A train takes 2 hours to travel 120 km. If it increases its speed by 20 km/h, how long will it take to travel the same distance?

A train takes 2 hours to travel 120 km. If it increases its speed by 20 km/h, how long will it take to travel the same distance?

Step 1: Find the original speed of the train. The train travels 120 km in 2 hours.
Step 2: Calculate the original speed using the formula: Speed = Distance / Time. So, Speed = 120 km / 2 h = 60 km/h.
Step 3: Increase the original speed by 20 km/h. New speed = 60 km/h + 20 km/h = 80 km/h.
Step 4: Use the new speed to find out how long it will take to travel the same distance of 120 km.
Step 5: Calculate the time using the formula: Time = Distance / Speed. So, Time = 120 km / 80 km/h.
Step 6: Perform the calculation: 120 km / 80 km/h = 1.5 hours.

Speed, Distance, and Time – Understanding the relationship between speed, distance, and time, and how to calculate one when the other two are known.
Unit Conversion – Ensuring that speed is in the correct units (km/h) and time is calculated in hours.