Question

a cylindrical pillar is 50 cm in diameter and 3.5 m in height find the ghost of painting the curved surface of the pillar at the rate of 12.50 rupess per metre square

Answer 1

curved surface area of cylinder =2pie r h
2*22/7*.25*3.5
5.5m2

cost = 12.50*5.5
Rs68.75

Answer 2

CSA = 2πrh
2x22÷7×2.5×3.5
=> 110m
1 m = ₹12.50
Then 110 m = ₹1375