Question

5. Kunal built a cubical water tank with lid for his
house, with each outer edge 1. 5 m long .He gets the
outer surface of the tank excluding the base
covered with Square tiles of side 25 cm. find how
much he would spend for the tiles, if the cost of
the tiles is rs 540 per dozen.
​

Answer 1

Answer:

edge (a) = 1. 5 m

Required surface area =

$5 \times {a}^{2}$

= 11.25 square meter

Area of tiles = 0.25 m × 0.25 m

= 0.0625 square meter

number of tiles = 11.25÷ 0.0625 = 180

cost of 12 tiles = ₹ 540

cost of 180 tiles =₹ 8,100