Flying to Tahiti with a tailwind a plane averaged 259 km/h. On the return trip the plane only averaged 211 km/h while flying back into the same wind. Find the speed of the wind and the
speed of the plane in still air.

Let assume that the speed of plane is x

whereas, The speed of the wind is y

According to the first condition

That is,

Speed of plane + Speed of wind = 259 km/h

Subsitute the required variables,

That is,

Speed of plane - Speed of wind = 211 km/h

Subsitute eq(1) in eq( 2 ) :-

Thus, The speed of wind that is y is 24 km/h

Subsitute the value of y in eq(1) :-

Hence, The speed of the wind and the plane in still is air are 24km/h and 235km/h .

a rotation about point l

step-by-step explanation:

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