Question

the diameter of the base of a right circular cylinder is 10 centimetre and its height 21 cm find the cost of painting the curved surface at rs 1.50 per CM^2​

Answer 1

Answer:

2472.75

Step-by-step explanation:

Answer 2

Answer: 660 cm²

Step-by-step explanation:

curved surface area of a right circular cylinder = 2πrh.

Given:

diameter of the circular base = 10 cm,

radius = 10/2 = 5 cm,

height = 21 cm.

CSA of a cylinder = 2×22/7×5×21

                               =2×22×5×3

                               =44×15

                               =660 cm²

cost of painting = 660×1.5

                           =Rs.990