Question

A boat can go 20 km upstream and 30 km downstream in 3 hours. It can go 20 km downstream and 10 km upstream in 1*2/3 hours. Find the speed of the boat in still water and the speed of the stream. please answer fast

Answer 1

let the speed of the boat be x km in per hour in still water
speed of stream be y km per hour
speed up stream is (x-y) km per hour.
speed downstream is ( x +y) km per hour.
x+y-y +x = 20/3 +30/3
2x = 50/3 km per hour.
x = 25/3 km per hour
Distance covered by the boat upstream in one hour is 10 km.
Speed of stream = 10-25/3
=5/3=2 2/3 km per hour

Answer 2

Answer:

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