Find the TSA of a hemisphere of radius 5cm.
We know that the total surface area of hemisphere with radius r is TSA=3πr2.
It is given that the radius of the hemisphere is 5 cm, therefore,
TSA=3πr2=3×227×(5)2=3×227×25=16507=235.71cm2
Hence, the total surface area of the hemisphere is 235.71 cm2.