Question
An iron spherical ball of radius 21cm is melted and it is re-casted in hemispheres of radius 7cm. The number of balls formed will be
___
___
Answer:
:
The volume will remain constant.
Let's assume x such hemispherical balls will be formed.
So 43πR3=x23πr3
(Where R is the radius of spherical ball and r is the radius of thehemispheres)
⇒43π(21)3=x23π(7)3
⇒x=2×21×21×217×7×7
⇒x=54
Was this answer helpful ?
:
The volume will remain constant.
Let's assume x such hemispherical balls will be formed.
So 43πR3=x23πr3
(Where R is the radius of spherical ball and r is the radius of thehemispheres)
⇒43π(21)3=x23π(7)3
⇒x=2×21×21×217×7×7
⇒x=54
Was this answer helpful ?
More Questions on This Topic :
Latest Videos
Latest Test Papers
Submit Solution