Question

four times the area of the curved surface of a cylinder is equal to 6 times the sum of the area of its base is its height is 12 cm find its curved surface area​

Answer 1

Explanation:

Curved Surface Area= 2πrh sq.cm

Area of the base = πr² sq.cm.

Sum area of the base= πr²+πr²= 2πr²sq.cm

A.T.Q

4(2πrh)= 6×2πr²

8πrh=12πr²

2h=3r

2×12=3r

r=8cm.

Curved Surface Area=2πrh

= 2×22/7×8×12

=4224/7

= 603.42 sq.cm

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Answer 2

603.42cm2
Hope it helps