Question

A diver rowing at the rate of 5 km/h in still water takes double thetime in going 40 km upstream as in going 40 km downstream. Find
the speed of the stream​

Answer 1

Answer:

x=2.5 km/hr

Step-by-step explanation:

Speed of the boat in water =.5 km/hr

Let the speed of the stream be x km/hr

So, the speed of the boat upstream will be

(5-x) km / hr

So, the speed of the boat downstream is (5+x)

k/hr

Time given to cover 40 km upstream = 3(time

taken to cover down stream)

⇒40/ (5-x) km/hr = 3(5+x)

⇒1/(5-x)=3(5+x)

⇒5+x=15-3x

⇒x+3x=15-5

⇒4x=10

⇒X=10/4

⇒X=5/2

∴x=2.5 km/hr