Find the curved surface area and the total surface area of a hemisphere with a diameter of $126 \, cm$.

(N/A) Given diameter $d = 126 \, cm$,so radius $r = \frac{126}{2} = 63 \, cm$.
Curved Surface Area of a hemisphere $= 2 \pi r^2 = 2 \times \frac{22}{7} \times 63 \times 63 = 2 \times 22 \times 9 \times 63 = 24,948 \, cm^2$.
Total Surface Area of a hemisphere $= 3 \pi r^2 = 3 \times \frac{22}{7} \times 63 \times 63 = 3 \times 22 \times 9 \times 63 = 37,422 \, cm^2$.