A car travels for 40 min at 45 mph. Then travels 145 minutes at 70 mph. Find the total distance.

We need find the total distance the car
traveled.

First, the car travels for a speed of S1 = 45
mph. The time is T1= 40 min.

Let us calculate the distance
D1.

First we will convert 40 min to
hours.

==> 40 min = 40/60 hours = 2/3
hour

==> D1 = S1*T1 = 45* 2/3 = 30
miles.

Then the car travels for 145 min at a speed of S2 =
70 mph

We will convert time to
hours.

==> T2 = 145 min = 145/60 = 29/12 = 2 5/12 
hours.

==> D2 = 29/12 * 70 = 169.1666
miles.

Then the total distance the car travels is D1 + D2 =
30+169.166 = 199.166 miles.

Then the total
distance is 199.166 miles