SOLUTION: Two planes leave an airport at 8 a.m., one flying north at 480 km/h and the other flying south at 520 km/h. At what time will they be 3000 km apart?
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Question 224308: Two planes leave an airport at 8 a.m., one flying north at 480 km/h and the other flying south at 520 km/h. At what time will they be 3000 km apart? Answer by drj(1380) (Show Source):
You can put this solution on YOUR website! Two planes leave an airport at 8 a.m., one flying north at 480 km/h and the other flying south at 520 km/h. At what time will they be 3000 km apart?
Step 1. Let x be the amount of time for the planes to be 3000 km.
Step 2. Let distance=speed*time.
Step 3. Let 480x be the distance traveled at 480 km/h.
Step 4. Let 520x be the distance traveled at 520 km/h.
Step 5. Then 480x+520x=3000 be the total distance of 3000 km traveled by both planes.
Step 6. Solving the equation in Step 5 yields the following steps
Divide 1000 to both sides of the equation
hours. So 3 hours ahead of 10 a.m. is 1 p.m.
Step 7. ANSWER: The planes will be 3000 km at 1 p.m.
I hope the above steps were helpful.
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