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josefaarancibia5
28.10.2019 •
Mathematics
Las cruces, nm, is about 600 mi from dallas, tx. one plane flies from
dallas to las cruces in 1 hr 12 min. and another plane with the same
air speed flies from las cruces to dallas in 1 hr 30 min. find the air
speed of the planes and the speed of the wind.
Solved
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Ответ:
The air speed of the plane is 450 mph and that of the wind is 50 mph.
Step-by-step explanation:
Let the speed of the plane is u and that of wind is v.
Therefore, with (u + v) speed the plane goes from Dallas to Las Cruces, i.e. 600 miles in 1 hr and 12 minutes i.e. 1.2 hours.
So,
.......... (1)
And with (u - v) speed the plane goes from Las Cruces to Dallas in 1 hour and 30 minutes i.e. 1.5 hours.
So,
......... (2)
Solving equation (1) and equation (2), we get 2u = 900, ⇒ u = 450 miles per hour.
Now, from equation (1), we get, v = 500 - 450 = 50 miles per hour.
So, the airspeed of the plane is 450 mph and that of the wind is 50 mph. (Answer)
Ответ:
$400
Step-by-step explanation:
all you do is add 320+540+230+450+280+580/6 and the asnwe comes out to 400