Pleaseeeeee help
A certain plane flying with the wind travels 540 miles in 2 hr. later flying against the same wind the plane travels 690 mi in 3 hr. find the speed of the plan in still air and the speed if the wind?

Question

Pleaseeeeee help
A certain plane flying with the wind travels 540 miles in 2 hr. later flying against the same wind the plane travels 690 mi in 3 hr. find the speed of the plan in still air and the speed if the wind?

anonymous · Answer

r*t = d
speed is r+w for 2hrs and r-w for 3 hrs.  you end up with two equations in two unknowns.

I have to have your permission to give you the answer.  Do you want only the answer now?

anonymous · Answer

Yes please

anonymous · Answer

Could you help me with the two equations

anonymous · Answer

$$\{2(r+w)=540,3(r-w)=690\}$$$$\{r=250\text{ mph},w=20\text { mph}\} $$where r is the speed of the plane and w is the wind speed.

anonymous · Answer

Thank you soooo much

anonymous · Answer

Your welcome.