Question

find the radius of a sphere who's surface area is 154m2​

Answer 1

Answer:

Area of sphere =

$4\pi r {}^{2}$

154 = 4×

$4 \times \frac{22}{7} \times {r}^{2} = 154$

${r }^{2} = \frac{154}{4} \times \frac{7}{22}$

${r}^{2} = \frac{49}{4}$

$r = \sqrt \frac{49}{4}$

$r = \frac{7}{2}$

so radius is given above