If the weight of 45 packets of biscuits of the same size is 21 kg. What is the weight of 30 such biscuit packets?

If the weight of 45 packets of biscuits of the same size is 21 kg. What is the weight of 30 such biscuit packets?

1). 10 kg
2). 12 kg
3). 14 kg
4). 9 kg

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