Averages Q.7

0. A and B start from the same destination and take the same route. A starts at 8 a.m. and drives at a speed of 40 kmph. B starts at 9 a.m. and drives at a speed of 50 kmph. If the destination is 350 km away from the starting point, then how far will A be from the destination when B reaches there?

Answer
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Option : B
Explanation : Time taken by B to reach destination = 350/50 = 7 hours
If A has a head start of 1 hour then the distance travelled by A when B reaches the destination
= 40 × (7 + 1) = 320 km
Hence, A has to still travel 30 km while B has reached the destination.

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