A small plane takes off and heads directly upwind to an airport 40 miles away. It takes 30 minutes to get there. The return trip takes 20 minutes. What is the speed of the wind in miles per hour?

Step-by-step explanation:

IIada, Distance = speed*time, so speed = distance/time right?

The plane went the same distance each direction.

s - w = 40/30 = 4/3

s + w = 40/20 = 2

Adding the two equations together...

s = 5/3

w = 1/3

So the speed of the wind in miles per hour is 1/3

second option

step-by-step explanation:

the measures of a triangle equal 180. use that to find x.

2x+3x+4x=180

9x=180

9x/9=180/9

x=20

now you know x, you know angle a is 40°, angle b is 60°, angle c is 80°.

because angle a is 40°, the first option doesn't work.

because angle b is 60°, the second option does work.

when you add angle a and b, you get 100°. complementary means it equals 90°, so the third option doesn't work.

when you add angle a and c, you get 120°, which is not 100.