During cooking, a chicken loses 10% of its weight due to water loss. In order to obtain 1,170 grams of cooked chicken,

how many grams of uncooked chicken must be used?

Let x be the weight of the uncooked chicken.

After cooking, the chicken will lose 10% of its weight, so the weight of the cooked chicken will be 90% of the weight of the uncooked chicken.

0.9x = 1170

Dividing by 0.9 on both sides, we get:

x = 1300

Therefore, 1300 grams of uncooked chicken must be used to obtain 1170 grams of cooked chicken.