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Find the Lateral surface area of the frustum, if the slant height is 15cm and having radii as 14 cm and 21 cm.(a) 1648.5 cm^2(b) 1115 cm^2(c) 2105.4 cm^2(d) 1237.2 cm^2The question was posed to me in examination.I'm obligated to ask this question of Surface Area & Volumes in portion Surface Area and Volumes of Mathematics – Class 10

Answer» RIGHT answer is (a) 1648.5 cm^2

The best explanation: s = 15 cm, R = 42 cm, r = 28 cm

Lateral Surface AREA of FRUSTUM (L) = π(R + r)s

L = 3.14(21 + 14 )15

= 1648.5 cm^2


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