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The volume of a sphere is …

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The volume of a sphere is 4851cm³. How much should its radius be reduced so that its volume becomes 4312/3cm³?

Posted by Sadhna Kashyap 8 years, 10 months ago

CBSE > Class 09 > Mathematics

1 answers

Rashmi Bajpayee 8 years, 10 months ago

Volume of sphere = 4851

(4/3)πr³ = 4851

r³= (4851 × 3 × 7)/(4 × 22)

r = 10.5 cm

Again,

Reduced volume of sphere = 4312/2

(4/3)πr³= 4312/2

r³= (4312 × 3 × 7)/(3 × 4 × 22)

r = 7 cm

There for radius should be reduced to 10.5 - 7 = 3.5 cm.

1Thank You

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CBSE > Class 09 > Mathematics