Question

find the radius of the base of a right circular cylinder whose height is 63 cm and the curved surface area is 1980 cm square

Answer 1

problem is solved in picture plzz check out

Answer 2

Answer:

Step-by-step explanation:

C.S.A OF CYLINDER = 2πrh

Therefore, c.s.a= 1980

1980=2×22/7×63.×r (H =63cm)

1980=2×22×9 ×r (63÷7=9)

990=22×9×r

110=22×r

10=2×r

r=10÷2

r=5