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If the height of a bucket in the shape of frustum of a cone is 16 cm and the diameters of its two circular ends are 40 cm and 16 cm then its slant height is

A

20 cm

B

`12sqrt5` cm

C

`8sqrt(13)` cm

D

16 cm

Text Solution

Verified by Experts

The correct Answer is:
A
`l=sqrt(h^2+(R-r)^2)=sqrt((16)^2+(20 -8)^2)cm `
`=sqrt(256+144) cm =sqrt(400) cm = 20 cm `
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RS AGGARWAL-VOLUME AND SURFACE AREAS OF SOLIDS-Multiple Choice Questions (Mcq)
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