Homework problem: Average speed and time

[Lindseyosu]

Homework Statement

A golfer rides in a golf cart at a speed of 3.10 m/s for 24.0 s. She then gets out of the cart and starts walking at an average speed of 1.30 m/s. For how long (in seconds) must she walk if her average speed for the entire trip, riding and walking, is 1.90 m/s?

Homework Equations

The Attempt at a Solution

I don't know where to begin with this problem. I assume that distance plays a factor in the problem, but I'm not sure.

 

[rl.bhat]

Find the distance traveled in the golf car. Assume she walks for t s. Find distance she walks in terms of t. Find the total distance and total time. You know the average velocity. From that find t.