Question

a toy is in the form of a cone mounted on hemisphere of same radius 7cm.if the total height of the toy is 31 cm, find its total surface area. ​

Answer 1

CSA of cone = πrl

=(22/7)(7)(√(r²+h²))

=(22)(√7²+(31-7)²)

=(22)(√49+576)

=(22)(√625)

=(22)(25)

=550 cm²

CSA of hemisphere=2πr²

=2(22/7)(7²)

=(44/7)(49)

=(44)(7)

=308 cm²

Therefore, total surface area of the toy = CSA of cone + CSA of hemisphere

=550+308

=858 cm²

Answer 2

868 os the ans of your que