1.

A boat can travel with a speed of 13 km/hr in still water.if the speed of the stream is 4 km/hr, find the time taken by the boat to go 68 km downstream. a) 2 hrs b) 3 hrs c) 4 hrs d) 5 hrs

Answer»

Correct option: c) 4 hrs

Explanation: 

Speed downstream=(13+4) kmph =17 kmph

Time taken to travel 68 km downstream = (68/17) hrs = 4 hrs



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