Against the wind a small plane flew 245 miles in 1 hour and 10 minutes. the return trip took only 50 minutes. what was the speed of the wind? what was the speed of the plane in still air?
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Ответ:
speed of plane in still air = 252 mph
speed of wind = 42 mph.
Explanation:
Given:
Distance travelled by the small plane = 245
Time taken to fly 245 miles = 1 hour and 10 minutes.
Time taken for return trip = 50 minutes.
To Find:
speed of the wind=?
The speed of the plane in still air=?
Solution:
We Know that
=>![\frac{245}{ \frac{70}{60}} hours](/tpl/images/0398/4838/e7295.png)
=>![\frac{245}{ \frac{7}{6}} hours](/tpl/images/0398/4838/ff17a.png)
=>![245 \times { \frac{6}{7}](/tpl/images/0398/4838/6caa1.png)
=>210 mph against wind
on way back
=>![\frac{245}{ \frac{50}{60}} hours](/tpl/images/0398/4838/a419d.png)
=>![\frac{245}{ \frac{5}{6}} hours](/tpl/images/0398/4838/01116.png)
=>![245 \times { \frac{6}{5}](/tpl/images/0398/4838/296c1.png)
=> 294
Now
294 = plane +wind------------------------(1)
210 =plane - wind-------------------------(2)
Solving (1) and (2)
2 plane = 504
plane = 252
plane =![\frac{504}{2}](/tpl/images/0398/4838/6d1af.png)
So substituting plane value in eq(2) we get,
210 =252 - wind
wind = 42 mph
Ответ:
in the past, this region was colonized by the French Empire, which explain why french language is pretty common to be spotted here.
It's predicted that the Swahili had a sum of 650,000 muslim population as its members.