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A motor car moves at a speed of 72 km/h and 54 km/h after and before repairing respectively. It covers X distance in 6 hours after repairing. How much time (in hours) will it take to cover 5X distance before repairing?

A motor car moves at a speed of 72 km/h and 54 km/h after and before repairing respectively. It covers X distance in 6 hours after repairing. How much time (in hours) will it take to cover 5X distance before repairing? Correct Answer 40

Let T be the time taken by the car to cover 5X distance before repairing

Since, distance = speed × time

So, X = 72 × 6

⇒ X = 432 km

Now, according to question

5 × 432 = 54 × T

⇒ T = 40 hours

∴ Required time is 40 hours

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