''Twenty-seven balls each having a radius of 2cm is melted to make one big iron ball..
What is the radius of the big iron ball?
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Answer:
The radius of the big iron ball = 6 cm
Step-by-step explanation:
The volume of 27 balls and the big ball will be same
27 × ( 4÷3 pi r^3 ) = 4÷3 pi R^ 3
27 × ( 4÷3 pi ×8 ) = 4÷3 pi R ^3
27 × 8 = R^3
R = cube root 27 × 8
= 6
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