Question 121672
90/45=2 HOURS FOR THE GOING TRIP.
90/X=(3 2/3-2)
90/X=(1 1/3)
(1 1/3)X=90
X=90/(1 1/3)
X=67.5 MPH FOR THE RETURN TRIP.
PROOF:
2*45+(1 1/3)*67.5=180
90+90=180
180=180