Question 910248
An airplane went 960 miles in the same length of time that a second plane went 1,200 miles. The speed of the second plane was 40 miles an hour faster than that of the first. How long did each plane travel?
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let x=speed of 1st plane
x+40=speed of 2nd plane
distance/speed=travel time
..
960/x=1200/(x+40)
1200x=960x+38400
240x=38400
x=160
x+40=200
960/160=6
How long did each plane travel? 6 hrs