Answers

2016-02-16T06:10:54+05:30
Given :- Volume of the sphere = 4851 cm³
⇒ 4/3πr³ = 4851
⇒r³ = 4851*3*7/4*22
⇒ r³ = 441*21/8
⇒r = ∛ 21*21*21 / 2*2*2
⇒ r = 21/2
⇒ r = 10.5 cm.

According question :-
Volume reduced in the sphere = 4312/3 cm³ .
⇒ 4/3 π r³ = 4312/3
⇒ r³ = 4312*3*7 / 3*4*22
⇒ r³ = 196*7/4 
⇒r³ = 49*7
⇒ r = ∛ 7*7*7
⇒ r = 7 cm.

Radius reduction is 10.5 cm - 7 cm.
⇒ 3.5 cm
∴ The radius should be reduced 3.5 cm

Thank you.....!!!!
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Yours, Jahnavi.
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