You can find the distance of Jerome's run by multiplying the time he spends running by his speed: 4 miles/hour * 6 hours = <<4*6=24>>24 miles.

Then find Nero's speed by dividing the distance he runs by the time he spends running: 24 miles / 3 hours = <<24/3=8>>8 miles/hour.

# Answer

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It takes Jerome 6 hours to run the trail around the park and it takes Nero 3 hours. If Jerome runs at 4 MPH, what speed (in MPH) does Nero run in the park?
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It takes Jerome 6 hours to run the trail around the park and it takes Nero 3 hours. If Jerome runs at 4 MPH, what speed (in MPH) does Nero run in the park?
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