A toy is made by mounting a right circular cone on a hemisphere
MATHEMATICS · Multi-part · CBSE · Mathematics · Surface Areas and Volumes · Surface Areas and Volumes
Problem
A toy is made by mounting a right circular cone on a hemisphere. The common radius is 3.5 cm and the height of the cone is 8 cm. The conical part is to be painted red at Rs 2.50 per square centimetre and the hemispherical part blue at Rs 1.50 per square centimetre.
Use π=722.
(i) Calculate the curved surface area to be painted red.
(ii) Calculate the curved surface area to be painted blue.
(iii) Determine the total cost of painting the toy.