Question 654006
1680/6=280 MPH IS THE SPEED WITH THE WIND.
1680/7=240 MPH IS THE SPEED AGAINST THE WIND.
(280-240)/2=X
40/2=X
20=X OR THE SPEED OF THE WIND.
PROOF:
280-20=240+20
260=260 ANS. FOR THE CRUISING SPEED OF THE PLANE.