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Question 57
The radius of the base of a right circular cylinder is 3 cm and its curved surface area is $$60 \pi cm^2$$ , The volume of the cylinder (in $$cm^3$$) is:
Solution
Radius(r) = 3 cm
curved surface area = 2 $$\pi \times r \times h$$
60$$\pi$$ =2 $$\pi \times 3 \times h$$
h = 10
Volume of cylinder = $$\pi \times r^2 \times h$$
=Â $$\pi \times 3^2 \times 10 = 90 \pi$$
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