Answer Posted / nishant chauhan

IN THIS QUESTION RELATIVE SPEED WILL BE(50+40)KM/H AND NOT
(50-40)KM/H BECAUSE SPEED ALWAYS ADDS WHEN VEHCLES ARE
TRAVELLING IN OPPOSITE DIRECTION. AND SPEED SUBSTRACTS WHEN
VEHCLES TRAVELLS IN SAME DIRCTION WHILE FINDING RELATIVE SPEED.
SO THE SOLUTION IS AS FOLLOWS:-

A is travelling at 50kmph, B is travelling at 40
kmph........according to the formula

time taken to meet = distance between them
----------------------
relative speed of two vehicles

so, time taken to meet= 15/(50+40)= 15/90= 0.1667hrs= 10
MINUTES.

SO, CORRECT ANSWER IS 10 MINUTES..

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