Question

A person swims downstream 64 km in 4 hours and 40 km upstream in 5 hours. Find his speed in still water and the speed of the stream.​

Answer 1

Speed of boat -11.4km/hr

Speed of stream -4.6km/hr

Step-by-step explanation:

let X be Speed of boat.

let you be Speed of stream.

S=D/T

Down stream=x-y

upstream=X+y

x-y=64/4

=16

X+y=64/5

=12.8

By linear equation of two variables

X=11.4 km/hr

y=4.6 km/hr