Question

find the radius of a sphere whose surface area is 154cm^2​

Answer 1

Answer:  r≈3.5

Step-by-step explanation:  

Let x be radius  

⇒Surface Area =154cm∧2

∴4πx∧2=154

X ∧2= 154*7/4*22=49/4

x=√49/4

x= 3.5 cm

it may help u

Answer 2

Answer:

❁SOLUTION❁

LET THE,

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

Radius = r

ANSWER:-

Surface area:- 4$\pi$$r^{2}$

154$cm^{2}$ = 4$\pi r^{2}$

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

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

$r^{2}$ = 12.25

r = $\sqrt{12.25}$

r = 3.5

So, the required answer is 3.5

Step-by-step explanation: