find the volume of a sphere whose surface area is 154 cm square
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ur solution is here
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ur solution is here
hope it helps u
#APS☺
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Total Surface Area of sphere = 4 pi r^2
=> 4 pi r^2 = 154
=> 4× 22 × r^2 /7 = 154
=> r^2 = 154 × 7 / 22 × 4
=> r^2 = 7 × 7 / 4
=> r^2 = 49/4
=> r = 7/2 cm
=> r = 3.5 cm
Now,
Volume = 4/3 pi r^3
= 4×22 × 3.5 × 3.5 ×3.5 / 3 × 7
= 88 × 0.5 × 3.5 × 3.5 /3
= 44 × 3.5 × 3.5 / 3
= 539 / 3
= 179.6 cm^3
=> 4 pi r^2 = 154
=> 4× 22 × r^2 /7 = 154
=> r^2 = 154 × 7 / 22 × 4
=> r^2 = 7 × 7 / 4
=> r^2 = 49/4
=> r = 7/2 cm
=> r = 3.5 cm
Now,
Volume = 4/3 pi r^3
= 4×22 × 3.5 × 3.5 ×3.5 / 3 × 7
= 88 × 0.5 × 3.5 × 3.5 /3
= 44 × 3.5 × 3.5 / 3
= 539 / 3
= 179.6 cm^3
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