Jane put a 12 in. tall bucket of under a leak in her sink. The bucket fills at a constant rate of 1/2 in. every 1/6 of an hour. How many hours will it take to fill the bucket?

12 inch bucket fills half an inch every 10 mins

20 mins is 1 inch

40 mins is 2 inch

60 mins is 3 inch

80 mins is 4 inch

100 mins is 5 inch

120 mins is 60 inch and 6 inch is half of 12 so

double 120 to get 240 which is 4 hours