Question

from a cylinder having diameter 14 cm,a cone of equal radius and height 24 cm is removed out. find the curved Surface area and total surface area of remaining part.
plzzz reply it fast
i am doing my homework sooo​

Answer 1

(* means multiplication) and (CSA means curved surface area)

Now,

In Cylinder;

d=14cm ,r=7cm ,h=24cm , curved surface area= 2πrh

In Cone;

d=14cm ,r=7cm ,l(slant height)=√h²+r² =√24²+7² =√576+49 =√625 =25

Curved surface area= πrl

Solution:

Total surface area= CSA of cone+ CSA of cylinder+ base of cylinder

= πrl +2πrh +πr²

= πr(l+2h+r)

= πr(25+2*24+7)

= πr(25+48+7)

=πr(80)

=22/7*7*80

=22*80

=1760cm²

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