Flying against the wind,an airplane travels 2,880 miles in 4 1/2 hours. flying with the wind,the airplane can travel the same distance 4hours
.find the speed of the plane in calm air
A)680
B)40mph
c)50mph
D)610mph

Question

Flying against the wind,an airplane travels 2,880 miles in 4 1/2 hours. flying with the wind,the airplane can travel the same distance 4hours
.find the speed of the plane in calm air
A)680
B)40mph
c)50mph
D)610mph

anonymous · Answer

Let s and w be the speed of the plane and the wind respectively.  Solve the following for s and w:$$\left\{\frac{9}{2}(s-w)\text{ = }2880,4(s+w)\text{ = }2880\right\}$$$${s = 680 mph, w = 40 mph} $$

anonymous · Answer

Thank you