Question

a plane took 4 hours to cover 2400km while flying with the wind. against the wind it took 6hours to cover same distance. find the speed of the plane in still air and the speed of the wind

Answer 1

speed of plane flying with wind=distance/time

=2400/4=600km/h
speed of air against wind =distance/time
=2400/6=400km/h
speed of plane + speed of wind=600 km/h
X+y=600--------(1)
speed of plane-speed of wind=400km/h
x-y=400-------(2)
from equation (1) and(2),we get X=500 y =100
There fore speed of plane is 500km/h and speed of wind is 100 km/h
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