The dimensions of an oil tin are 26 cm× 26 cm× 45 cm. Find the area of the tin sheet required for making 20 such tins. If 1 square metre of the tin sheet costs Rs. 10, find the cost of tin sheet used for these 20 tins.
Given,
Dimensions of oil tin are = 26 cm × 26 cm × 45 cm
Then,
Area of tin sheet required for making one oil tin = total surface area of oil tin
= 
= 
Area of tin sheet required for 20 oil tins = 
So,
Cost of 1 m2 tin sheet = Rs. 10
∴cost of 12.064 m2 tin sheet = 
9