Problema Solution
Flying with the wind, a plane traveled 345 miles in 3 hours. Flying against the wind, the plane traveled the same distance in 4.6 hours. Using two unknowns, find the rate of the plane in calm air and the rate of the wind.
Answer provided by our tutors
speed of wind = x speed of plane in calm air = y plane speed when flyinfg with the wind =x+y= 345/3= 115 miles/hr plane speed against wind = x-y = 75miles/hr adding the above equations = 2x= 190 x= 85 miles per hour and speed of wind is 10 miles per hour