the surface area of sphere is 616 squre cm id its radiua is changed so that the area get reduced 75% then the radius bevomes
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bhai maths nahi aati sorry go for another
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4πr^2 = 6l6
r^2 = 616/4xπ = 49
r=v49=7cm
when area reduced to 75%
New area=616x75 / 100:=462
462=4πr^2.
r^2 = 462 / 4π =36.7
r=6cm
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