Question

A toy is in the form of a cone of radius 3.5 cm mounted on a hemisphere of same radius the total height of the tower is 15.5 cm find the total surface area of the toy and its volume

Answer 1

it's a math question u can refer in ur book in ex 13.1

Answer 2

Solution: Radius of cone = 3.5 cm, height of cone = 15.5 – 3.5 = 12 cm

Slant height of cone can be calculated as follows:

10 surface area volume exercise solution

Curved surface area of cone can be calculated as follows:

10 surface area volume exercise solution

Curved surface area of hemispherical portion can be calculated as follows:

10 surface area volume exercise solution

Hence, total surface area = 137.5 + 77 = 214.5 sq cm