Question

toy is form of cone surmounted hemisphere.The diameter base &height cone are 6cm &4 cm .diameter the surface area of the toy​

Answer 1

HEY MATE...!

HERE IS UR ANSWER...!

The surface area of the toy=surface area of the cone+surface area of the hemisphere

Diameter of the base of cone=6cm

therefore, r=3cm, height of the cone=4cm

Surface area of the cone=πrl, where l is the slant height

$\sqrt{h {}^{2} { + r}^{2} } = \sqrt{4 {}^{2} { + 3}^{2} } = \sqrt{25}$

=5 cm

therefore, surface area of the cone=3.14×3×5cm^

Surface area of the hemisphere=2πr^=2×3.14×3×3cm^

=> surface area of the toy=3.14×3×5+2×3.14×3×3

=3.14×3(5+2×3)cm^

=3.14×3×11=103.62cm^

Hence, the surface area of the toy=103.62cm sq^

HOPE IT HELPS...!

THANKS.