Two tractors worked together and plowed the whole area in 8 hours. If 1 tractor works alone, the field will be plowed within 18 hours. How many hours will it take to plow the field if the second tractor works alone?​

At the "no mutants allowed" country farm, every sheep has 4 legs, every chicken has two legs, and all animals have only 1 head. asked to count how many sheep and chicken are in the fields, a farm boy reports back that there are 140 feet and 50 heads. how many sheep and chicken are there? there are sheep and chicken at the farm.