Posted by **Dee Williams** on Wednesday, October 25, 2006 at 8:32am.

The time t required to drive afixed distance varies inversely as the speed r. It takes 5 hr at a speed of 80 km/h to drive a fixed distance. How long will it take t odrive the same distance at a speed of 70 km/hr?

Please help!

In an inverse dependence situation, the product of the two variables is a constant. In this rase, r x t = constant

Therefore

5 hr x 80 km/h = t x 70 km/h

t = (80/70) x 5 h = 5.714 hr

= 5 hr 42.9 min

## Answer this Question

## Related Questions

- ~Algebra question~ - The time, t, required to drive a certain distance varies ...
- One Algebra Question~! - The time, t, required to drive a certain distance ...
- math - the time t that it takes for a salesman to drive a certain distance d ...
- math - the time t that it takes for a salesman to drive a certain distance d ...
- algebra - 1. The time t that it takes for a salesman to drive a certain distance...
- algebra - 1. The time t that it takes for a salesman to drive a certain distance...
- Math - 20. The time t required to drive a certain distance varies inversely with...
- 3 questions Math - 18. What is the simpler form of the following expression? (6x...
- Algebra - The time, t, required to drive a certain distance varies inversely ...
- Math help - 9). Hooke’s Law. The distance d when a spring is stretched by a ...