Mark Brainliest please
Answer: 5 cm
Step-by-step explanation:
Curved Surface area of a cylinder formula :-
2.pie*r*h (where r is the radius)
Height = 21 cm
Curved Surface area of the cylinder = 660 cm2
So, 2* pie* r* h = 660 (Here I will assume pie to be 22/7)
And 2* 22/7 * 21* r = 660
And 132 * r = 660
Therefore, r = 660/132 = 5cnn
Therefore radius of the cylinder = 5 cm
