Question

A rectangular water tank is 90 cm wide and 40 cm deep. If it can contain 576 litres of water. What is

its length?​

Answer 1

Answer:

160cm

Step-by-step explanation:

Let the length of the rectangular tank be l cm.

Given its width is 90 cm, and depth is 40 cm.

Now the volume of the rectangular tank is 90×40×l=3600l cm

3

.

Given it can hold 576 litres =576,000 cm

3

of water.

Then

3600l=576,000

or,l=

36

5760

or, l=160.

So length is 160 cm.

Answer 2

Answer:

Step-by-step explanation:

Width - 90 cm.

Depth - 40 cm.

Volume - 576 l.

We need to find the  length of the rectangular tank.

Solution:

       The volume of the tank is given in litres so will convert it into cm³ by multiplying the term in litres with 1000.

 So the volume of the rectangular tank is 576000 cm³.

The formula to find the volume of the rectangular tank is LBH.

 Volume of the tank = LBH

 576000 = L×90×40

           L = 576000/90×40.

           L = 160 cm