Question

A river 2m deep and 45m wide is flowing at the rate of 3 km per hour. Find amount of water that runs

into sea per minute.​

Answer 1

Answer:

area of cross section of river= 2 x 45 = 90 m^2

so, water flowing into the sea= area of cross section x rate of flowing water

                                              = 90 x 3000

                                              = 270000 m^3

there water flowing per minute= 270000 / 60 = 4500 m^3

Step-by-step explanation:

Answer 2

we have breath i.e, 45m and height i.e, 2m
But we have not length
Now,
rate of flow of water is 3km/h
In one minute distance covered = 3000/60 m = 50 m
Which is also taken as length
Now ,
volume of water that run into sea per minute is
L×B×H
= 50×45×2 = 4500 m³