If the volume of a cylinder of height 7 cm is 448 cm cube find its lateral surface area and total surface area
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Volume of a cylinder = π (r)^2 h 448 = 22/7 × (r)^2 × 7 448 / 22 = (r)^2 20.36 = (r)^2 4.51 = r so, r = 4.51 cm Lateral surface area = 2 π r h = 2 × 22/7 × 4.51 × 7 = 198.44 cm^2 (approx) Total surface area = 2 π r ( h + r ) = 2 × 22/7 × 4.51 ×( 4.51 + 7 ) = 2 × 22/7 × 4.51 × 11.5 = 326.29 cm^2 (approx)
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