• Numerical Ability - Mensuration
Question

A solid sphere of radius 20 cm is melted to form 12 spherical balls. Find the radius of each of the ball. 

  • A) 12 cm
  • B) 8 cm
  • C) 20 cm
  • D) 10 cm
  • E) 15 cm
Solution

D) 10 cm
Explanation: 
Volume of each of the 8 ball = [(4/3)*(22/7)*203]/8
So (4/3)*(22/7)*r3 = [(4/3)*(22/7)*203]/8
Solve, r = 10

D) 10 cm
Explanation: 
Volume of each of the 8 ball = [(4/3)*(22/7)*203]/8
So (4/3)*(22/7)*r3 = [(4/3)*(22/7)*203]/8
Solve, r = 10
Comments