Question

find the area of base
base and radius of a
cylinder if its
curved surface area is 660sq.cm
and height is 21cm
​

Answer 1

Answer:

Step-by-step explanation:

curved surface area of cylinder = 2 π r h

⇒ 660 cm² = 2 x 22 / 7 x r x 21 cm

⇒ (660 cm² x 7) / (2 x 22 x 21 cm) = r

⇒ r = 5 cm

Area of base of cylinder = π r ²

= 22 / 7 x 5 cm x 5 cm = 78.57 cm²