Flying with the wind a plane went 386 km/h. Flying into the same wind the plane only went 318 km/h. find the speed of the plane in still air and the speed of the wind.

Speed of plane  in air is  352 km/hr and speed of wind is 34 km/hr

Step-by-step explanation:

Average speed of plane in with wind = 386 km/h

Average speed of plane against wind = 318 km/hr

Consider the speed of plane in wind be  x km/hr and speed of plane against wind  be  y  km/hr

As such speed of plane in wind would be  x + y km/hr and speed of plane  against wind would be  x - y km/hr. i.e

x+y = 386

x-y = 318

by solving these two equation, we get

2x=704

x= 352 km/hr

y=386 - 352

y= 34 km/hr

Hence, Speed of plane  in air is  352 km/hr and speed of wind is 34 km/hr

answer: x=3 and y=4

step-by-step explanation:

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