SOLUTION: Two planes, which are 2160 miles apart, fly toward each other. Their speeds differ by 40mph. If they pass each other in 4 hours, what is the speed of each?
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Question 1149233: Two planes, which are 2160 miles apart, fly toward each other. Their speeds differ by 40mph. If they pass each other in 4 hours, what is the speed of each?
Using logical analysis and simple mental arithmetic....
The combined speed is 2160/4 = 540.
If the two speeds were the same, they would each be 270; 270+270=540.
To get two speeds that differ by 40mph, add 20mph to one speed and subtract 20mph from the other.
