Question 251115
D=RT
275=40X+30(8-X)
275=40X+240-30X
10X=275-240
10X=35
X=35/10
X=3.5 HOURS FOR THE 40 MPH TRIP.
8-3.5=4.5 HOURS FOR THE 30 MPH TRIP.
12:00-3:30=8:30 IS THE TIME OF THE BEGINNING OF HIS TRIP.