(Q5) A Company wants to manufacture 1000 hemospherical basins from a thin steel sheet. If the radius of each basin is 21 cm, find the area of steel sheet required to manufacture the above hemispherical basins ?
Radius of the hemispherical basin (r) = cm
Surface of a hemispherical basin = 2πr2
= × × ×
= cm2
Hence, area of the steel sheet required for one basin = cm2
Total area of steel sheet required for 1000 basins = ×