Question

four times the area of curved surface of a cylinder is equal to 6 times the sum of the area of its two bases if its size is 12 find its curved surface area.​

Answer 1

Solution:-

• Curved Surface Area cylinder = 2πrh

• Area of the base = πr²

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 cylinder = 2πrh

• => 2 × 22/7 × 8 × 12

• => 4224/7

• => 603.42 sq.cm