Question

the diameter of the base of a right circular cylinder is 42 cm and the height is 10 cm find its curved surface area

Answer 1

CSA of cylinder=2πrh
=2*22/7*21*10
=2*22*3*10
=44*30
=1320cm²

Answer 2

Answer:

1320 cm²

Step-by-step explanation:

Diameter of the base = 42 cm

Height of the cylinder = 10 cm

Curved Surface Area of Cylinder = 2×π×Radius×Height

                                   or π × Diameter × Height    [ ∵ 2×Radius = Diameter]

                                  = (22/7) × (42) × 10

                                  = 1320 cm²

Hence, Curved Surface Area of given cylinder is 1320 cm²