The radius of a cylinder is 2 r units and height is 3 r units. Find the curved surface?	Pick.
A) 862	B) 298	C) 440	D) 278	E) 278
r = 7   h = 3   2πr(h + r) = 2 * 22/7 * 7(10)   = 440   Answer: 440
<result>C</result>
The radius of a cylinder is 2 r units and height is 3 r units. Find the curved surface?