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Question

Shubham covers a distance at a speed of 50 km/h in 4 hours. How long will it take for him to cover the same distance if he travels at a speed of 80 km/h?

A
150 minutes
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B
120 minutes
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C
100 minutes
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D
80 minutes
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Solution

The correct option is A 150 minutes
Given, a certain distance is covered at a speed of 50 km/h in 4 hours.

We know that more is the speed for the same distance the lesser is the time taken to travel.

So, Speed(x)1Time(y) for the same distance
x1x2 = y2y1

Given,
x1 = 50 km/h
y1 = 4 hours
x2 = 80 km/h
and y2 = time taken at 80 km/h

y2 = x1×y1x2
y2 = 50 × 480 = 52 hours

52 hours = 52 × 60 = 150 minutes

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