RD Sharma - Mathematics

Book: RD Sharma - Mathematics

Chapter: 21. Mensuration-II (Volumes and Surface Areas of a Cuboid and a Cube)

Subject: Maths - Class 8th

Q. No. 8 of Exercise 21.4

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A tank open at the top is made of iron sheet 4 m wide. If the dimensions of the tank are 12m×8m×6m, find the cost of iron sheet at Rs. 17.50 per metre.


Dimensions of tank = 12m × 8m × 6m

Where length = 12m , breadth = 8m , height = 6m

Area of sheet required for making the tank = total surface area of tank with one top open







Cost of iron sheet at rate Rs.17.50 per metre = 17.50 ×84 = Rs.1470

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