Flying with the wind a plane went 306 km/h. Flying into the same wind the plane only went 235 km/h. Find the speed of the plane in still air and the speed of the wind

Answer 1

p + w = 306

p - w = 235

2p = 541

p = 541/2 = 270.5 km/h = plane speed in still air

w = 306-270.5 = 35.5 km/h = wind speed