Question
Find the volume , curved surface area and the total surface area of a cylinder with diameter of base 7 cm and height 40 cm .
Answer: Option A
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Volume = ` pi r^2 h = (22/7 xx 7/2 xx 7/2 xx 40) cm^3= 1540 cm^3`
Curved surface area = `2pi r h` = `(2 xx 22/7 xx 7/2 xx 40) cm^2 = 880 cm^2`
Total surface area = `2pi r h + 2 pi r^2 = 2 pi r(h + r)`
= `[2 xx 22/7 xx 7/2 xx (40 + 3.5)] cm^2 = 957 cm^2`
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