A pair of rooks brings the chicks 40-45 g of insects per day, which is about 1000 individuals of different species

A pair of rooks brings the chicks 40-45 g of insects per day, which is about 1000 individuals of different species. Chicks are fed for 30 days. Calculate how many harmful locusts can be destroyed by one colony of rooks in 200 nests during the period of feeding the chicks. Accept that in this area, rooks feed mainly on these insects.

If 2 rooks bring 1000 insects per day, then in 30 days they will destroy 30,000 insects (1000 * 30 = 30,000).

Rooks are paired individuals, therefore there are 400 birds in the colony, since there are only 200 nests, and in each nest there are 2 rooks.

Now let’s make a proportion with the unknown “X”, in which we calculate how many insects 400 birds can kill in 30 days:

2 rooks = 30,000 insects;

400 rooks = X insects;

2 * X = 400 * 30,000;

2X = 12,000,000;

X = 12,000,000 / 2;

X = 6,000,000.

Answer: 6,000,000 insects.