The radius of a sphere is increased by 25percentage find the new surface area
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Answer:
Step-by-step explanation: let's the radius be x
If the radius is increased by 25 percent so the new radius X+X/4
Surface area of Sphere is 4πr^2
4×π×x^2= old radius
New radius= 4×π×(x+X/4)^2
=4×π×(5x/4)^2
=4×π×25x/16
=π×25x/4
Plzzz mark brainleist
Answered by
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Answer:
Step-by-step explanation:
see r is changing by 25%
dr/dt=0.25
as SA= 4πr²
ds/dt=8πrdr/dt
ds/dt=8πr(0.25)
ds/dt=2πrcm²/sec
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