Question

16. A rectangular water tank is 90 cm wide and 40 cm deep. If it can contain 576 litres of water,
what is its length?
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Answer 1

Answer:

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

3600l=576,000or,l= 5760/36

or, l=160.

or, l=160.

So length is 160 cm.

Answer 2

Answer:

160 cm

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 90×40×1 = 3600l cm³.

Given it can hold 576 litres =576,000 cm³   of water.

Then

3600l =576,000

or, l =  36/5760

or, l=160.

So length is 160 cm.