A hemispherical bowl made of brass has inner diameter 10.5 cm. Find the cost of tin-plating it on the inside at the rate of Rs 16 per 100
.
Solution:
Inner diameter of hemispherical bowl
cm
Inner radius of hemispherical bowl
cm
Inner curved surface area of bowl
Cost of tin plating 100
of inner curved surface area = Rs 16
Cost of tin plating 1
of inner curved surface area
= Rs 0.16
Cost of tin plating 173.25
of inner curved surface area
Rs 27.72
Soanam says
Class. 9madipur. Village