At a factory, the number of cars produced is directionally proportional to the number of factory workers are making the cars. It takes 45 hours to make 60 cars. Use a proportion to find out how long it will take to make 250 cars.

Is a for each hour he works,his earnings go up by $4

Volume is length times width times height so
20 times 8 times 30 which is 4,800
surface area is ph (p is perimeter of base), h is height.
so perimeter would be length+length+width+width so 20+20+8+8 which is 56. so multiply 56 times 30 which is 1680. hope this !