How many balls of radius 2 cm can be made by melting a bigger ball of diameter 16 cm? (Take π = $\frac{22}{7}$)

How many balls of radius 2 cm can be made by melting a bigger ball of diameter 16 cm? (Take π = $\frac{22}{7}$)
1). 64
2). 128
3). 32
4). 96

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