Find the total surface area of a solid hemisphere whose radius is 4.2 cm. (Take π=22/7)

266.32 cm2 366.32 cm2 166.32 cm2 466.32 cm2

166.32 cm2

We know that, Total surface area of hemisphere = 3πr2 We have, Radius of hemisphere = 4.2 m Total surface area of hemisphere =  3 × \(\frac{22}{7}\)× 4.2 × 4.2 = 3 × \(\frac{22}{7}\)× 17.64  = 166.32 cm2