The area of a parallelogram can be found in the same way as that of a rectangle, so base x height. To find the base we have to do area ÷ height or 18 1/3 ÷ 3 1/3= 5.5 feet
So if in 2 hours you drove 80 miles the in 1 hour you have to have driven 40 miles (80m/2h) so you have to divide the 1200 miles by the 40mph to find out how many hours the trip will take (1200m/40mph=30h)