SOLUTION: A plane leaves Chicago headed for Los Angeles at 520 mph. One hour later, a second plane leaves Los Angeles headed for Chicago at 690 mph. If the air route from Chicago to Los Ange
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Question 701018: A plane leaves Chicago headed for Los Angeles at 520 mph. One hour later, a second plane leaves Los Angeles headed for Chicago at 690 mph. If the air route from Chicago to Los Angeles is 1800 miles, how long will it take (after the first plane takes off) for the first plane to pass the second plane? (Round your answer to two decimal places.)
How far from Chicago will they be at that time? (Round your answer to the nearest whole mile.) Answer by checkley79(3341) (Show Source):
You can put this solution on YOUR website! D=RT
D=520*T
D=690(T-1)
1800=520T+690(T-1)
1800=520T+690T-690
1210T=1800+690
1210T=2490
T=2490/1210
T=2.06 HOURS LATER THEY WILL MEET.
PROOF:
1800=520*2.06+690(2.06-1)
1800=1071.2+690*1.06
1800=1071.2+731.4
1800=1802.6
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