Question

A swimmer covers a distance of 13km against the current in 2 hrs and a distance of 24 km in still water in 3 hrs. Find the time taken by him to cover 19 km downstream​

Answer 1

Answer:

2 hrs

Step-by-step explanation:

Given,

a swimmer covers a distance of 13km against current in 2 hr

against the current means upstream

we know,

upstream=m-s

downstream=m+s

m-s=13/2

m-s=6.5 km/hr

a distance of 24km in still water in 3hrs

m is speed in still water and s is speed of current

m=24/3

m=8

m-s=6.5

s=1.5 km/hr

m+s=8+1.5

m+s=9.5

find the time taken by him to cover 19 km downstream

time=Distance/speed of downstream

        =19/9.5

        =2 hrs