SOLUTION: Tom and Gary are leaving the same town for a meeting in different cities. However, they have not quite finished discussing a business plan. Tom must leave 1 hours earlier than Gary

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Question 567236: Tom and Gary are leaving the same town for a meeting in different cities. However, they have not quite finished discussing a business plan. Tom must leave 1 hours earlier than Gary to make his meeting. Tom heads east on a train at 45 miles per hour. Gary heads west on a train at 70 miles per hour. How long can they talk on their phones if the phones have a range of 280.75 miles?
Answer by lwsshak3(11628) About Me  (Show Source):
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Tom and Gary are leaving the same town for a meeting in different cities. However, they have not quite finished discussing a business plan. Tom must leave 1 hours earlier than Gary to make his meeting. Tom heads east on a train at 45 miles per hour. Gary heads west on a train at 70 miles per hour. How long can they talk on their phones if the phones have a range of 280.75 miles?
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let x=Gary's travel time(hrs)
x+1=Tom's travel time(hrs)
distance=speed*travel time (both traveling in opposite directions)
70x+45(x+1)=280.75
70x+45x+45=280.75
115x=280.75-45=235.75
x=235.75/115=2.05 hrs
ans:
They can talk on their phones for 2.05 hrs