Problema Solution
Two planes leave O'Hare airport in Chicago at the same time. One flies directly east at 540 miles per hour. The other plane flies directly west at 720 miles per hour. How long will it take them to be 1890 miles apart?
Answer provided by our tutors
the total distance in 1 hour covered by them = 720 + 540= 1260 miles
So, the distance is incrreasing by 1260 miles per hour. To find out how long it will take them to become 1890 miles apart, you need to divide 1890 by 1260.
time= 1890/1260 = 1.5 hours