Mensurationhard · Past Paper
How much metal sheet is required to make a closed cylindrical tank of height 1.4 m and base diameter 140 cm?
A12.32 m²
B6.16 m²
C7.48 m²
D9.24 m²
✓ Correct Answer: D — 9.24 m²
r = 0.7 m, h = 1.4 m. TSA = 2πr(r+h) = 2 * (22/7) * 0.7 * (0.7+1.4) = 4.4 * 2.1 = 9.24 m².
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