Question

if a Boat goes 7 km upstream in 42 minutes and the speed of the stream is 3 kilometre per hour then the speed of the boat is still water is​

Answer 1

Step-by-step explanation:

Rate upstream = (7/42)*60 kmh = 10 kmph.

Speed of stream = 3 kmph.

Let speed in sttil water is x km/hr

Then, speed upstream = (x —3) km/hr.

x-3 = 10 or x = 13 kmph