# physics

posted by .

On a drive from your home to town, you
wish to average 52 mph. The distance from
your home to town is 106 miles. However,
at 53 miles (half way), you ﬁnd you have
averaged only 39 mph.
What average speed must you maintain in
the remaining distance in order to have an
overall average speed of 52 mph?

• physics -

To drive 106 miles at an average speed of 52 mph requires a total driving time of
106/52 = 2.03846 hours.

If you drive the first 53 miles at an average speed of 39 mph, you have used up 53/39 = 1.35897 hours

You still need to cover 53 miles in the remaining time available, 0.67949 hrs.
That means that you have to average
53/0.67949 = 80.000 mph during the last half.

## Similar Questions

1. ### Help!...Math...

Two cars leave town going opposite directions. One car is traveling 55 mph, and the other is traveling 65 mph How long will it take before they are 180 miles apart?
2. ### Science - Physics

How long would it take you to drive from Houston to Gatorville LA (235 miles0 if you drive the first 75 miles at 60 mph, the next 100 miles at 65 mph, and the last 60 miles at 70 mph?
3. ### math

One day we decided to drive from Town A to Town D. In order to get there we had to drive through Town B and then Town C. It is 10 miles farther from Town A to Town B than it is from Town B to C. IT is 10 miles farther from Town B to …
4. ### Math

One day we decided to dive from town A to town B. In order to get there we had to drive through town B and then town C. it is 10 miles farther from town A to town B then it is to town B to C. It is 10 miles farther from town B to town …
5. ### Physic Help

In heavy rush-hour traffic in Atlanta, you drive in a straight line at 21 mph for 5 miles. Then you have to stop for 10 minutes and finally drive slowly by a car wreck that is 2 miles away at a steady 15 mph. After the wreck, the road …
6. ### physics

On a drive from your home to town, you wish to average 39.6 mph. The distance from your home to town is 108 miles. However, at 54 miles (half way), you find you have averaged only 29.7 mph. What average speed must you maintain in the …
7. ### Math

One day we decidid to drive from town A to town D.In order to get there,we had to drive through town B and C.It is ten miles farther from town A to town B than it is from town B to town C.It is ten miles farther from town B to town …
8. ### math-pre calc

On a drive from your home to town, you wish to average 48 mph. The distance from your home to town is 106 miles. However, at 53 miles (half way), you find you have averaged only 36 mph. What average speed must you maintain in the remaining …
9. ### Physics

On a drive from your home to town, you wish to average 44 mph. The distance from your home to town is 106 miles. However, at 53 miles (half way), you find you have averaged only 33 mph. What average speed must you maintain in the remaining …
10. ### Physics

On a drive from your home to town, you wish to average 52 mph. The distance from your home to town is 108 miles. However, at 54 miles (half way), you find you have averaged only 39 mph. What average speed must you maintain in the remaining …

More Similar Questions