Question

find the surface area of the sphere whose radius is 7 cm​

Answer 1

Answer:

the other is = 616 cm²

Step-by-step explanation:

s.a if sphere = 4×22/7×7×7

= 88×7

= 616 cm²

Answer 2

Given that

Radius of sphere is 7cm

To find

Surface area of sphere

Solution

Let r is radius of sphere

a is surface area of sphere

As we know that

$surface \: area \: of \: sphere = 4\pi \times {r}^{2} \\ = 4 \times \pi \times r \times r$

put

$\pi = \frac{22}{7}$

hence

$a = 4 \times \frac{22}{7} \times 7 \times 7$

$a = 88 \times 7 \\ = 616 {cm}^{2}$

hence area of sphere is 616${cm}^{2}$