Question

radius of a sphere is 3.5cm then find it's volume and surface area

Answer 1

$volume = \frac{4}{3} \pi {r}^{3} =\frac{4}{3} \times \frac{22}{7} \times { (\frac{7}{2} )}^{3}$

$surface \: area = 4\pi {r}^{2} = 4 \times \frac{22}{7} \times {3.5}^{2}$