Mr. Verma drives his car at uniform speed from bottom of a mountain to the top in 30 minutes along a helical path as shown.

At the beginning the speedometer of his car shows 6225 km, while on reaching the top it reads 6285 km. (Take upward as positive y-axis and positive x-axis towards right)
His displacement vector during the journey is

Options

A. `(-3hati + 4hatj)km`
B. `3 km `
C. `5 km `
D. none of these

Answer

A

Explanation

Displacement vector,