Question

a motor boat goes down the stream 30 km and again returns to the starting point in a total time of 4 hours and 30 minutes . If the speed of the stream is 5 km / hr , then find the speed of the boat in still water.​

Answer 1

Answer:

5 km/hr

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Answer 2

Answer:

15 km/h

speed of the boat = X km/h

speed of the stream =5 km/h

speed in upstream =x-5km/h

speed in downstream = X+5 km/h

30/x-5+30/X+5= 9/2

X=15

The speed of the boat is 15 km/h