Multiple choice

Varun reached the destination 2 minutes ahead of time on driving at the speed of 48 km / hr . If it is 42 km / Hour speed, Varun will arrive 1 minute late. For what distance does Varun have to drive ?

  1. 16.8 km

  2. 18.6 km

  3. 19.6 km

  4. 15.8 km
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A Correct answer
Explanation

Let distance be d km. At 48 km/h, time is d/48 hours. At 42 km/h, time is d/42 hours. Time difference = 3 minutes = 3/60 = 1/20 hour. So d/42 - d/48 = 1/20. Solving: d(8/336) = 1/20, d = 336/(8×20) = 16.8 km.

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