The radius of a cylinder is 12 m, height 21 m. the lateral surface area of the cylinder is:
Choose the correct answer:	A) 1584	B) 1854	C) 1458	D) 1485	E) None of them
Lateral surface area = 2πrh   = 2 × 22/7 × 12 × 21   = 44 × 36   = 1584 m(power2)   1584nswer is 1584.
<result>A</result>
The radius of a cylinder is 12 m, height 21 m. the lateral surface area of the cylinder is: