# CBSE Class 9 Answered

**If 1 m**

^{2}of sheet costs Rs. 400. Find the cost of sheet required to make a closed cylindrical tank of height 1.4 m and base diameter 210 cm.
Asked by Topperlearning User | 12 Oct, 2017, 08:05: AM

Expert Answer

Given: Base diameter of the tank = 210 cm

Then, radius (r) = 105 cm

Height (h) = 1.4 m = 140 cm

Let S denote the total surface area of the tank.

Cost of 1 m^{2} of sheet = Rs. 400

Cost of 16.17 m^{2} of sheet = Rs. (400 x16.17) = Rs. 6468

Answered by | 12 Oct, 2017, 10:05: AM

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