Lightning Strikes Twice

Using a good sighting compass and a stopwatch it was observered that a lightning bolt struck the ground 16°16° West of North from my position. The resulting thuder crack was heard 2.8s2.8 s later. Another lightning bolt was spotted hitting the ground at 44°44° West of North. The thunder rumble associated with that bolt was heard 9.2s9.2 s after seeing the lightning. How far apart were the two lightning strikes expressed in kmkm?

Assume the speed of sound is 340msec340 \frac{m}{sec}

Image credit: Wikipedia أسامة الطيب

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