A motor boat whose speed is 9km/h in still water goes 12km down stream & comes back in atotal time 3 hours.Find the speed of the stream.

Dear Student!

Here is the answer to your query.

Given : Speed of the boat = 9 km/hr

Let the speed of stream be x km/hr

Then the speed of boat in upstream and down stream will be (9 – x) km/hr and (9 + x) km/hr respectively.

Also the boat goes and comes 12 km each in 3 hours

∴The speed of the stream = 3 km/hr

Cheers!