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windline829
08.12.2019 •
Mathematics
Flying against the wind an airplane travels 2640 km in 4 hours finder with the wind the same plane travel 7700 km in 7 hours what is the rate of the plane in still air and what is the rate of the pain
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Ответ:
Step-by-step explanation:
Let x represent the speed of the plane.
Let y represent the speed of the wind.
Flying Against the Wind an airplane travels 2640 km in 4 hours. This means that the total speed while flying against the wind will be x - y. Speed = distance/time. Therefore
x - y = 2640/4 = 660 - - - - - - -1
Assuming that in still air, the airplane moves in the same direction with the wind. Total speed in still air will be
x + y
Flying with the wind, the same plane travel 7700 km in 7 hours.
Speed = distance/time. Therefore
x + y = 7700/7 = 1100 - - - - - - - 2
Add equation 1 and equation 2. It becomes
2x = 660 + 1100 = 1760
x = 1760/2 = 880
y = 1100 - x
y = 1100 - 880 = 220
The speed of the plane in still air is 880 km/hour
The speed of the wind is 220 km/ hour
Rate of the plane in still air is 1100 km/hour
Rate of the plane against the wind is 880- 220 = 660 km/h
Ответ:
Divide 3 each: 15 divided by 3=5
24 divided by 3= 8
You can't go further than that.
Therefore your answer will have to be 5:8 or 5/8. Hope this helped!