Question

The length, breadth and height of a fish tank are 40 cm,
60 сra and 50 cm, respectively. 50 L of water is filled in it.
How much more water should be poured into it to fill it
completely?
(1) 50 L
(2) 60 L
(3) 70 L
(4) 120 L​

Answer 1

Given:

• Length of cuboidal tank = 40 cm
• Breadth of cuboidal tank = 60 cm
• Height of cuboidal tank = 50 cm
• Amount of water in tank = 50 L

To find:

• How much more water should be poured into it to fill it completely?

Solution:

First of all, we need to find capacity/volume of tank,

We know that,

★ Volume of cuboid = l × b × h

➻ 40 cm × 60 cm × 50 cm

➻ 120000 cm³

Now, convert cm³ to ml

➻ 120000 cm³ = 120000 ml

Again, convert ml to litres,

➻ 120000 ml = 120 litres

Now, We have to find,

Amount of water needed to fill the tank completely,

Volume of tank - Amount of water in tank

➻ 120 - 50

➻ 70 litres

∴ Hence, 70 litres more water required to fill the tank completely.

Answer 2

Given :-

Dimensions of a fish tank :-

• Length = 40 cm
• Breadth = 60 cm
• Height = 50 cm

• The volume of water filled in the tank = 50 L

To find :-

• Volume of water required to fill the tank completely

Solution :-

Volume of the fish tank = Volume of water in the tank

• Formula to find volume = length × breadth × height

Put the given values -

$\leadsto$ 40 × 60 × 50

$\leadsto$ 120,000 $\sf{cm^3}$

Volume of the water in the tank = 120,000 cubic centimeter.

[ Convert the volume from cubic cm to litre ]

• Divide the value by 1000.

• Volume of water in litres = 120 L

Volume of water required to fill the tank completely = 120 L - 50 L

= 70 L

Answer => Part 3 ) 70 L