CBSE Class 9 Answered
If 1 m2 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.
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 m2 of sheet = Rs. 400
Cost of 16.17 m2 of sheet = Rs. (400 x16.17) = Rs. 6468