Question

write the formula to find the curved surface of area of frustum of a cone as shown in figure​

Answer 1

Answer:

The Curved Surface Area (CSA) of the frustum of a cone is: = pi * l(R + r) where the (r) stands for = radius of the smaller circle and (R) stands for = radius of the bigger circle and the (l) = slant height of the frustum

Answer 2

$\tt \: { \red{\pi \times l(r1 + r2)}} \\ \tt \:   Where, \: r1 \: is \: the \: radius \: of \: the \: smaller \: circle  \\ \tt \: r2 \: is \: radius \: of \: bigger \: circle  \\ \tt \: and \: l \: is \: the \: slant \: height \: of \: the \: frustum.$

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