1.

Find the slant height if the Frustum of height 22 cm has its diameter as 34 and 50cm.(a) 83.40 cm(b) 43.90 cm(c) 23.40 cm(d) 73.48 cmI got this question during an interview.This key question is from Surface Area & Volumes in chapter Surface Area and Volumes of Mathematics – Class 10

Answer»

Right ANSWER is (c) 23.40 cm

To elaborate: h = 22 cm, R = 25 cm, r = 17 cm

The slant height of a CONE (s^2) = h^2 + (R – r)^2

s^2 = 484 + (25 – 17)^2

s^2 =548

s = 23.40 cm



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