Question

Find the area of base and radius of a cylinder if it's curved surface area is 660sq cm and height is 21 cm​

Answer 1

Answer:

Step-by-step explanation:

The curved surface area of a cylinder is 2πrh

Area of the base of the cylinder is πr²

CSA is given as 660 cm and height is 21cm

660 = 2 × π × r × 21

660 = 2 × 22× r × 3

660= 132r

r = 660÷132

Area of the base of the cylinder is

Π × 5 × 5

22/7 × 5 × 5

550/7

=78.6 cm²

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Answer 2

hey dear~

ur ans is~ AB≈54.7cm²

(h ) Height 21 cm

(A) Surface area =660 m²