Question

A solid sphere metal is cut through its centre into 2 equal parts. If the diameter of the sphere is 3`1/3` cm , find the total surface of each part, correct to two decimal places. 

Answer 1

Diameter of the sphere = 3`1/3` cm = `10/3` cm

Therefore, radius = `5/3` cm

Total curved surface area of each hemisphere = `3pir^2`

= `3 xx 22/7 xx 5/3 xx 5/3`

= 26.19 cm² 

Total curved surface area of each hemisphere = 26.19 cm²