Waiting for a Friend: Solving a Time Difference Problem

[black_hole]

Homework Statement

You and a friend each drive 50 km. You travel at a uniform speed of 91.4 km/hr and your friend travels at a constant speed of 88.3 km/hr. How long will you wait for your friend?

Homework Equations

The Attempt at a Solution

So I thought I could just set up a ratio and cross-multiply to get the hrs. traveled by each person. I got .547hrs. for "me" and .566hrs. for "my friend". Then subtract, the difference being the answer. However, I am doing this on a computer-generated exercise and it is telling me that .019hrs. is incorrect. Why isn't this right?

 

[Redbelly98]

It looks like you did this correctly, I get the same answer. It could be they expect a different number of significant figures in the answer, or they expect different time units for some reason.