One plane travels 80 mph faster than another. while one travels 1750 mi, the other travels 950 mi. Find the speed of each plane.

Question

goformit100 · Answer

@hartnn  I think it's a Physics Question... it's like a Spam here on Maths section

goformit100 · Answer

@AccessDenied

bekkah323 · Answer

no its a math question. I'm supposed to use the d=rt formula.

whpalmer4 · Answer

$$d = r t$$
Plane 1 has a speed of $r_1$, Plane 2 has a speed of $r_2 = r_1+80$
$$d_1 = r_1 t = 950$$$$d_2 = r_2 t = (r1+80) t  = r_1 t + 80 t = 1750$$Substitute first equation in second:$$r_1 t + 80 t = 1750$$$$950 + 80t = 1750$$Solve for $t$, and use $t$ in both equations to find $r_1, r_2$

whpalmer4 · Answer

if this isn't suitable for the math section, neither are all of the coin problems, interest problems, exponential decay/growth problems, etc. no particularly deep knowledge of physics required here — any math student should be able to do this problem.