The curve surface area of a cylinder, 5cm high is 110cm 2. Find the radius of its base. [Take (pi = frac{22}{7})]
-
A.
2.6cm -
B.
3.5cm -
C.
3.6cm -
D.
7.0cm
Correct Answer: Option B
Explanation
Curved surface area of cylinder = 2(pi)rh
110 = 2 x (frac{22}{7}) x r x 5
r = (frac{110 times 7}{44 times 5})
= 3.5cm