find the volume of a sphere whose surface area is 154 cm2
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Answered by
9
hello Friend
area of sphere =( 4πr^2
154 = (4×22×r^2 )/ 7
r^2 = (7/2)^2
r = 3.5 cm
vol of sphere =( 4πr^3 )/3
=( 4×22×7×7×7)/(3×3×3×3)
=372.64 cm^3
area of sphere =( 4πr^2
154 = (4×22×r^2 )/ 7
r^2 = (7/2)^2
r = 3.5 cm
vol of sphere =( 4πr^3 )/3
=( 4×22×7×7×7)/(3×3×3×3)
=372.64 cm^3
Answered by
6
Surface area of sphere = 4π r^2
so ,
154 = 4 π r ^2
r × r = 154 ×7 / 22 × 4
r ^2 = 49/ 4
r = 7/2 cm
Now volume of sphere = 4/3π r ^3
so ...
4/ 3 × 22 / 7 × 49/4×7/2
539/3 cm3
so ,
154 = 4 π r ^2
r × r = 154 ×7 / 22 × 4
r ^2 = 49/ 4
r = 7/2 cm
Now volume of sphere = 4/3π r ^3
so ...
4/ 3 × 22 / 7 × 49/4×7/2
539/3 cm3
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