A potter makes small hemispherical clay bowls of inner radius 5 cm
MATHEMATICS · Multi-part · CBSE · Mathematics · Surface Areas and Volumes · Surface Areas and Volumes
Problem
A potter makes small hemispherical clay bowls of inner radius 5 cm. She coats only the inside of each bowl with a glaze. Take π=3.14.
(i) Write the technical name for the surface that is being glazed.
(ii) State the mathematical formula for that surface.
(iii) Calculate the area of the inside surface to be glazed for one bowl.
(iv) If 1 gram of glaze covers 70cm2, how many grams are needed for one bowl?
(v) Justify in a sentence why the total surface area of the bowl is not relevant to this calculation.