Surface Areas and Volumes — Question 2

Given,

Radius of sphere (r) = 5.6 cm

By formula,

Surface area of the sphere (A) = 4πr²

Substituting values we get :

$A = 4 \times \dfrac{22}{7} \times (5.6)^2 \\[1em] = 4 \times \dfrac{22}{7} \times 5.6 \times 5.6 \\[1em] = 4 \times \dfrac{22}{7} \times 31.36 \\[1em] = 4 \times 22 \times 4.48 \\[1em] = 394.24 \text{ cm}^2$

Hence, surface area of sphere = 394.24 cm².