Question

a cylinder pillar is 50 cm in diameter 3.5 m in height find the cost of painting the curved surface of the pillar at the rate of 12. 50 rupees per metre square

Answer 1

50cm=0.5m
r=0.25m
2πrh
2×22/7×25/10×35
2×22×5/2×5
2×11×25
22×25
550m sq.
550×12.50
6875 Rs per metre square

Answer 2

85937.50this is your answer I think as I solve