SOLUTION: A cargo plane left Tokyo and flew toward Las Vegas at an average speed of 385.6 km/h. Some time later a passenger plane left flying in the opposite direction with an average speed

Question 236183: A cargo plane left Tokyo and flew toward Las Vegas at an average speed of 385.6 km/h. Some time later a passenger plane left flying in the opposite direction with an average speed of 201.6 km/h. After the cargo plane had flown for 7.5 hours the planes were 3597.6 km apart. Find the number of hours the passenger plane flew.
Answer by checkley77(12844) (Show Source): You can put this solution on YOUR website!
385.6*7.5+210.6X=3,597,6
2,895+210.6X=3,597.6
210.6X=3,597.6-2,895
210.6X=702.6
X=702.6/210.6
X=3.336 OR 3 HRS & 20 MIN. IS THE FLIGHT TIME FOR THE PASSENGER PLANE.
PROOF:
385.6*7.5+210.6*3.336=3,597.6
2,895+702.6=3,597.6
3,597.6=3,597.6
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