Question

A closed iron tank 12m long ,9m wide and 4m deep is to be made. Determine the cost of iron sheet used at the rate of RUPEE 5per m sheet being 2 m wide.

Answer 1

Area of iron sheet used = surface area of the iron tank

T.S.A of the tank = 2(lb+bh+lh)
=2(12×9+9×4+12×4)
=2(108+36+48)
=2(192)=384 m²

Area of iron sheet used =2×length =384 m²
length of iron sheet used =192m

Cost = 192×5
=960 Rs
So , building the tank will cost 960 Rs