Find the curved surface area, if the radius of a cone is 28 m and slant height is 30 m?
Options:
A) 2550	B) 2640	C) 3960	D) 4280	E) 5490
Cone curved surface area = Ï€rl   22/7 Ã— 28 Ã— 30 = 88 Ã— 30 = 2640 m(power2)   Answer is 2640.
<result>B</result>
Find the curved surface area, if the radius of a cone is 28 m and slant height is 30 m?