Question

The surface area of a sphere is 1386 cm 2 . Find its volume.

Answer 1

heya

here is ur answer

➡ surface area of a sphere =4πr^2

given :- surface area is 1386

➡4*22/7*r^2= 1386

➡88*r^2 = 1386*7

➡88*r^2 = 9702

➡r^2 = 9702/88

➡r^2 = 110.25

➡r = 10.5

ACQ :- volume of sphere = 4/3πr^3

➡ Volume = 4/3*22/7*10.5*10.5*10.5

➡ volume = 4*22*0.5*10.5* 10.5

➡ Volume = 4851

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hope it helps u..!!!

Answer 2

heyy ☺
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↪surface area of sphere = 4 pie r2
1386=4x22/7xr​2
1386x7/4x22=r2
88*r2=1386×7

r2=110.25
r=10.5
now,
volume=4/3 pie r3
               =  4/3x22/7 ×10.5*3

​               =4851cm3
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hope it helps