There are 180 tons of coal on the wharf, which was originally planned to be transported by 15 trucks, but actually reduced to 9 trucks. Now how many tons more are transported by each truck than originally planned?

There are 180 tons of coal on the wharf, which was originally planned to be transported by 15 trucks, but actually reduced to 9 trucks. Now how many tons more are transported by each truck than originally planned?

180 △ 9-180 △ 15 = 8 (ton)