SOLUTION: A cargo plane left Los Angeles and flew east at an average speed of 320 km/h. Some time later a passenger plane left flying in the opposite direction with an average speed of 155 k

Question 532228: A cargo plane left Los Angeles and flew east at an average speed of 320 km/h. Some time later a passenger plane left flying in the opposite direction with an average speed of 155 km/h. After the cargo plane had flown for 11 hours the planes were 4605 km apart. Find the number of hours the passenger plane flew.
Answer by lwsshak3(11628) (Show Source): You can put this solution on YOUR website!
A cargo plane left Los Angeles and flew east at an average speed of 320 km/h. Some time later a passenger plane left flying in the opposite direction with an average speed of 155 km/h. After the cargo plane had flown for 11 hours the planes were 4605 km apart. Find the number of hours the passenger plane flew.
**
let x=hours passenger plane flew
distance=travel time*speed
distance cargo plane traveled=320*11=3520
distance passenger plane traveled in opposite direction=155x
3520+155x=4605
155x=(4605-3520)
x=(4605-3520)/155
x=7
Ans:
passenger plane flew for 7 hrs
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