Question

a toy is in form of a cone of radius 3.5 cm mounted on a hemisphere of same radius the total height of the toy is 15.5 cm Find the total surface area of the toy​

Answer 1

Answer:

given, radius=3.5 cm

height of toy=15.5 cm

total surface area of toy =C.S.A of cone + C.S.A. of hemisphere

=πrl +2πr²

=π×3.5×12 +2×π×3.5×3.5 cm

=π×42+24.5×π cm

take π as common

=π(42+24.5)cm

=π×66.5 cm

=66.5×3.14 cm

=156.38 cm²