Explanation:

- We know the average weight of 30 boys is 5 kg more than the average weight of 20 girls.

- The total weight of 30 boys is given as 1050 kg.

- Therefore, the average weight of the boys is 1050 kg / 30 = 35 kg per boy.

- Let the average weight of the girls be x kg.

- So, the boys' average being 5 kg more makes it x + 5 = 35 kg.

- This implies the average weight of girls is x = 30 kg.

- Total weight of 20 girls = 20 * 30 = 600 kg.

Option:4 - 600 kg

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