A is faster than B. A and B each walk 24 km. The sum of their speeds i – InterviewSolution

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1.

A is faster than B. A and B each walk 24 km. The sum of their speeds is 7 km/hr and the sum of times taken by them is 14 hours. Then, A's speed is equal to?

Answer»

4 km/hr

Let A's speed = X km/hr. Then, B's speed = (7 - x) km/ hr.

So, 24/x + 24/(7 - x) = 14

x2 - 98X + 168 = 0

(x - 3)(x - 4) = 0 => x = 3 or 4.

Since, A is FASTER than B, so A's speed = 4 km/hr and B's speed = 3 km/hr.

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