Question

Ravi has built a cubical water tank with lid and each outer edge is 2.5m long The outer surface of the tank excluding the base is covered with square tiles of side 25m long . Find the number of tiles required

Answer 1

The surface area of the cubical tank = $6(a)^2$, where 'a' is the edge of the cubical tank.

Since, the tank is covered with square tiles but excluding the base.

So, Surface area of cubical tank to be covered with tiles = $5(a)^2$ ,

where 'a' is the edge of the cubical tank.

So, Surface area of tank = $5(2.5 m)(2.5 m)$

As 1 m = 100 cm

Surface area of tank = $5 \times 2.5 \times 100 \times 2.5 \times 100$

= 312500 $cm^2$

As, Area of square tile = $(side)^2$

= $(25 cm)^2$ = 625 $cm^2$

So, Number of tiles = Surface area of cubical tank $\div$ Area of 1 tile

= $312500 \div 625$

= 500

Therefore, 500 tiles are required to cover the cubical tank excluding the base.

Answer 2

Solution

Hope it helps you