Question

The speeds of two boats A and B in still water are 25 km/hr and 30 km/hr respectively. The boats are 165 km apart. If both begins moving toward each other, A going downstream while B upstream, then in how many hours they will meet?

• A. 3 hours
• B. 4 hours
• C. 5 hours
• D. 6 hours

Answer 1

Answer:

A. 3 hours

Let the speed of the current is S upstream speed of B is (30−S) and the downstream speed of A is (25+S). relative speed = (30−S) + (25+S) = 55 km/h Required time = Distance/Speed = 165/55 = 3 hour