How Fast Must You Travel to See Light Pulses Simultaneously?

[oa8]

Homework Statement

In a certain inertial frame two light pulses are emitted a distance 5 km apart and separated by 5 µs. As observed from another frame, which is traveling parallel to the line joining the points where the pulses are emitted at a velocity v with respect to this frame, the pulses are simultaneous. Find v.

Homework Equations

The Attempt at a Solution

i know this should be very simple, but i am so stuck!

 

[phyzguy]

You need to make more of an effort before we can help. What have you tried? Try drawing a space-time diagram of the situation, showing the light pulses.