Question 911886
r*t=d
(r+50)*t=2500
t=2500/(r+50) with the wind
(r-50)*T=2500
T=2500/(r-50) against the wind
t=2500/(r+50) with the wind
t+T=2500/(r-50) +2500/(r+50)
t+T = (5000r)/((r-50) (r+50))
t+T = (5000r)/(r^2-2500)