Question

A tank 20 m long, 12 m wide and 8 m deep is to be made of iron sheet. If it is open at the top. Determine the cost of iron-sheet, at the rate of Rs. 12.50 per meter, if the sheet is 2.5 m wide.

Answer 1

Area of sheet = Surface area of the tank

⇒ Length of the sheets x it's width = Area of 4 walls of the tank + Area of its base

⇒ Length of the sheet x 2.5 m = 2( 20 + 12 )  x 8m² + 20 x 12m²

⇒ Length of the sheet = 300.8 m

Cost of the sheet = 300.8 x Rs. 12.50 = Rs. 3760