Question

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

Answer 1

3km/hr=3*5/18
           =0.8m/s=4.8m/min
let us consider,
l=4.8m
b=45m
h=2m
V=lbh
  =4.8*45*2
  =432m^3

Answer 2

Answer:

The amount of water in cubic meters that runs into the sea per minute is 4500 cubic meter per min.

Step-by-step explanation:

Given : A river 2 m deep and 45m wide is flowing at the rate of 3km per hour.

To find : The amount of water in cubic meters that runs into the sea per minute?

Solution :

The height of the cube is h=2 m

The width of the cube is 45 m

The length of the cube is given by the rate of 3 km per hour.

1 km=1000 m

3 km=3000 m

Length = 3000 m

Area of the cube is $A=l\times b\times h$

$A=3000\times 45\times 2$

$A=270000m^3$

Water flow per hour is 270000 meter cube.

In 1 hour = 60 minutes

1 minute = $\frac{1}{60}$ hours

So, The amount of water in cubic meters that runs into the sea per minute is

$=\frac{270000}{60}$

$=4500m^3$