Question

A rectangular container with base of $200c{m}^2$ is filled with water to a height of 15cm.If the container has a height of 20cm,how much water should be added to fill it completely?

• A. 2l
• B. 3l
• C. 1l
• D. The container is already full

Answer 1

The correct option is C

1l

Given, area of base $=200c{m}^2$

height of container $=20cm$

Volume of the container = $(l\times b)\times h=a\times h=200\times 20=4000cm{}^3$

We know that $1000c{m}^3=1l$,so the capacity of the tank is $4l$

Water is filled to a height of 15cm

Volume of the tank in which water is filled $=(l\times b)\times h=200\times 15=3000cm{}^3$

Volume in which water is filled$=3l$

Amount of water to be added =Capacity of the container - Volume in which water is filled

= $4-3=1l$

Amount of water to be filled to completely fill the container is 1l