Answer:

2.5 cm

Step-by-step explanation:

Given

• Radius of spherical ball → 3 cm
• Spherical ball is melted and recast into three spherical ball.
• Radius of two of those spherical balls are 1.5 cm and 2 cm

To find:-

• Radius of third ball.

Solution:-

Let the radius of the unknown ball be x.

r₁ = 1.5 cm

r₂ = 2 cm

r₃ = x cm

r = 3 cm

Volume of Spherical Ball = Volume of 1st Ball + Volume of 2nd Ball + Volume of 3rd Ball

Hence, the radius of the spherical ball is 2.5 cm.