Question

The downstream speed of a boat is 4 km/hr more than its upstream speed and the ratio of the speed of the boat in still water to the speed of the stream is 11:2. Find the total time taken by boat to travel 52 km downstream and 45 km upstream?

Q: Answer-The downstream speed of a boat is 4 km/hr more than its upstream speed and the ratio of the speed of...

Let the speed of boat in still water be x kmhr and that of stream be y kmhr. ATQ, x y x y 4 y 2 kmhr x 2 112 11 kmhr Required time 52112 45112 9 hr

A 12 hrs

B 10 hrs

C 16 hrs

D 9 hrs

E 7 hrs

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The downstream speed of a boat is 4 km/hr more than its upstream speed and the ratio of the speed of the boat in still water to the speed of the stream is 11:2. Find the total time taken by boat to travel 52 km downstream and 45 km upstream?

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