Question

The area of the base of a right circular cylinder is 15400 CM square and its volume is 92400 cm cube find the area of curved surface. ​

Answer 1

Area of base of the right circular cylinder = πr²

15400 = 22/7×r²

r² = 15400×7/22 = 4900

r² = 4900

r = ✓4900 = 70 cm.

VOLUME OF CYLINDER = πr²h

92400 = 22/7×70×70×h

h = 92400/ 220 × 70

h = 6

Therefore,

The area of curved surface = 2πrh

= 2×22/7×70×6

= 44×10×6 = 440 × 6 = 2640 cm²

Hence,

Area of curved surface = 2640 cm² Answer.

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Answer 2

Answer refer to attachment..

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