The zoo has two water tanks that are leaking. one tank contains 10 gal of water and is leaking at a constant rate of 2 gal/h . the second tank contains 6 gal of water and is leaking at a constant rate of 4 gal/h. when will the tanks have the same amount of water

He ! a group of farmers planned to clean 80 acres of wheat per day to finish the work on schedule. right before the work started, they received a new piece of machinery that them clean 10 more acres per day than originally planned. as a result of increased productivity in the last day before the deadline they only had to clean 30 acres. how many acres of wheat did the group of farmers have to clean?