A and B are at points P and Q respectively. The destinations of A and B are Q and P respectively. Both of them started at the same time in the opposite directions on the same route. After some time t…

Question

A and B are at points P and Q respectively. The destinations of A and B are Q and P respectively. Both of them started at the same time in the opposite directions on the same route. After some time they met each other at the point R. A and B take respectively 9 hours and 4 hours to reach their destination from R, If the speed of A is 48 kmph then the speed B (in kmph) is

PYQPulse · Accepted Answer

72

PYQPulse · Answer

Explanation: Using (vA/vB)^2 = tB/tA = 4/9, so vA/vB = 2/3, giving vB = 72 kmph.

Answer: D. 72

Explanation