Mensurationmedium · Past Paper
A cylinder has a base radius of 7 cm and a total surface area of 748 cm². Find its height.
A10 cm
B8 cm
C12 cm
D15 cm
✓ Correct Answer: A — 10 cm
2πr(r+h) = 748 => 2 * (22/7) * 7 * (7+h) = 748 => 44(7+h) = 748 => 7+h = 17 => h = 10 cm.
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