You and a friend each drive 53 km to the same destination. you travel at 88.8 km/h and your friend at 92.6 km/h. how long will your friend wait for you at the end of the trip?

1.5 minutes

Explanation:

The time it takes for you to drive a distance of 53km at 88.8 km/h is

t = s/v = 53 / 88.8 = 0.5968 hours

Similarly the time it takes for your friend to drive a distance of 53km at 92.6 km/h is

53 / 92.6 = 0.572 hours

Obviously since it takes less time for your friend, he will arrive first if both of you start at the same time. His waiting time would be

0.5968 - 0.572 = 0.0245 hours or 0.0245 * 60 = 1.5 minutes

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