Anil makes a bucket open at the top in the shape of a frustum. The radii of its top and bottom are 21 cm and 7 cm and its height is 24 cm. Find the slant height of the bucket, in cm.
Class 10Frustum of a ConeMensuration
A55.56
B24.78
C27.78
D30.78
Step-by-Step Solution
l=h2+(R−r)2=242+(21−7)2=576+196=772=27.78 cm (approx).
Answer: C) 27.78
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