Question

A fish tank length, breadth and height is $40cm,60cm$ and $50cm$ respectively. It contains $50$ litre of water. How much water is needed to fill it completely.

• A. $50L$
• B. $60L$
• C. $70L$
• D. $120L$

Answer 1

Answer: (C)

$70L$

To find the capacity of the tank.

Volume of tank $=length\times breath\times height$

Volume $=40\times 60\times 50$

$=120000c{m}^3$

$\Rightarrow$convert $c{m}^3$ into $ml$

We get,

$\Rightarrow 120000c{m}^3=120000ml$

$\Rightarrow$convert $ml$to $l$

We get,

$120000ml=120l$

Amount of water needed $120-50=70$ liter

Hence,

$70$ liter of water is needed to fill the tank.