Question

a toy is in the form of a cone mounted on a hemisphere radius of base and h of the cone 7 cm 8cm respectively find the surface area​

Answer 1

Step-by-step explanation:

radius of cone =7cm

given the height of cone h =8cm

slant height l=√r²-h²

=√7²-8²

=√49-64

=√25

=5cm

L.S.A. of cone =πrl

=22/7×7×5

=22×5

=110cm²

L.S.A of hemisphere=⅔πr²

=⅔×22/7×7²

=⅔×22/7×49

=⅔×22×7

=308/3

=102.66

L.S.A of toy =L.S.A of cone+L.S.A of hemisphere

=110+102.66

212.66