Question

Your mother takes you to your grandparents house for dinner? She drives 60 minutes at a constant speed of 40 miles per hour. She reaches the highway, quickly speeds up, and drives for another30 minutes at a constant speed of 70 miles per hour.

Answer 1

1 hour time 40 miles/ hour =1*40=40miles
0.5 *70=0.5*70=35 miles
40+35=75 miles

60 minutes+30 minutes= 90 minutes or 1 1/2hours