Arun has built a cubical water tank with lid and each outer edge is 2.

1.	Arun has built a cubical water tank with lid and each outer edge is 2.5 m long. The outer surfaceof the tank excluding the base is covered with square tiles of side 25 cm long. Find the numberof tiles required.2.
Answer» Area to be covered = L.S.A. + Area of lid = 4a^2+a^2=5a^2. Now 2.5m = 250 cm Area= 5* 250 250 = 312500 cm^2 Area of 1 tile = 25 25 =625cm^2 No. of tiles = Total area /Area of 1 tile =312500/625 = 500 tiles

Arun has built a cubical water tank with lid and each outer edge is 2.5 m long. The outer surfaceof the tank excluding the base is covered with square tiles of side 25 cm long. Find the numberof tiles required.2.

Answer»

Area to be covered = L.S.A. + Area of lid = 4a^2+a^2=5a^2. Now 2.5m = 250 cm

Area= 5* 250 *250 = 312500 cm^2

Area of 1 tile = 25* 25 =625cm^2

No. of tiles = Total area /Area of 1 tile =312500/625 = 500 tiles