Question

with head wind, a plane flew 3600 km in 10 hr the return flight over the same route took only 9hr. find the wind speed and planes air speed

Answer 1

Let the plane speed be x
Let the wind speed be b

10 (x - b) = 3600

x - b = 360

9 ( x + b) = 3600

x + b = 400

add the two equations

2x = 760

x = 380

b = 20

Answer 2

plane speed is 380km / hr

wind speed is 20 km/ hr