preciosacarvalho
contestada

Two cyclists, 96 miles apart, start riding toward each other at the same time. One cycles 2 times as fast as the other. If they meet 4 hours later, what is the speed (in mi/h) of the faster cyclist?

a. Write an equation using the information as it is given above that can be solved to answer this problem. Use the variable
r
r to represent the speed of the slower cyclist.

Respuesta :

We use [tex]d=rt[/tex].  The distance covered is [tex]96[/tex] miles.  The rate is [tex]r+2r=3r[/tex], as both of the cyclists are covering part of this ground.  The time is [tex]4[/tex] hours.  So we have:

[tex]3r*4=96[/tex]

[tex]12r=96[/tex]

This is your equation, the solution to part (a).  

If you need to solve it, you can just divide by twelve, giving [tex]r=8[/tex].

Otras preguntas