Question

The surface area of a sphere is 616 sq cm. Find its radius tan β = `3/4`

Answer 1

Given, surface area of sphere = 616 cm²

We know that,

Surface area of sphere = 4πr²

∴ 4πr² = 616

⇒ r² = `616/(4π)`

⇒ r² = `(616 xx 7)/(4 xx 22)`

⇒ r² = 49

⇒ r = 7 cm

Hence, radius of sphere is 7 cm.