A cylclist is riding with a speed of `27 km h^-1`. As he approaches a circular turn on the road of radius `80 m`, he applies brakes and reduces his speed at the constant rate of `0.5 ms^-2`. What is the magnitude and direction of the net acceleration of the cyclist on the circular turn ?

Options

A. `8.6 m//sec^2 , 45^@28'`
B. `6.8 m//sec^2 , 54^@28'`
C. `0.86 m//sec^2 , 54^@28'`
D. `0.68 m//sec^2 , 45^@28'`