Math

Quote:

How do I calculate average speed miles per hour with 1 and a half hour

let's say you go D miles in 1 1/2 hrs.

1 1/2 = 3/2

so the average is D/(3/2) = 2D/3

so if you went say 120 miles in 1 1/2 hrs your average is 2*120/3 = 80 mph