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A motor cyclist is riding North in still...

A motor cyclist is riding North in still air at `20 km H^(-1)` . If the wind starts blowing westard with a velocity of ` 45.8 km h^(-1)` find the apparent velocity with which the motor cyclist moves, tiem it takes to cover ` 100 km` and its direction of motin.

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Here, ` A = 20 km h^(-1) , B = 45. 8 km h^(-1)`,
` theta= 90^@ , r= ? , beta = ?`
Time, ` t= distance //resultant velocity`.
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