A plane flies from Penthaven to Jackson and then back to Penthaven. When there is no wind, the round trip takes 4 hours, but when there is a wind blowing from Penthaven to Jackson at 60 miles per hour, the trip takes 4 hours and 10 minutes. How many miles is the distance from Penthaven to Jackson?
Please answer ASAP! Deadline is today.



Answer :