If the diameter of a solid hemisphere is 14 cm, then what will be its total surface area? $( π = \frac{22}{7})$

462 cm²

We know that,

The total surface area of hemisphere = 3πr²

We have,

The diameter of the hemisphere = 14 cm

Radius of hemisphere = \(\frac{14}{2}\) = 7 cm

The total surface area of hemisphere = 3 × π × (7)²  = 3 × \(\frac{22}{7}\)× 49 

= 3 × 22 × 7  = 462 cm²