A moving car possesses average velocities of `5 ms^-1, 10 ms^-1 and 15 ms^-1` in the first, second and third seconds respectively. What is the total distance covered by the car in these three seconds ?

Options

A. 15 m
B. 30 m
C. 55 m
D. None of these

Answer

B

Explanation

distance covered `= s = v_(av) xx time`
For `1st` second : `S_1 = 5 xx 1 = 5 m`
For `2nd` second : `S_(2)=10xx1=10 m`
For second `3rd` second : `S_1 = 15 xx 1 = 15 m`
Total distance traveled
`S = S_1 + S_2 + S_3 = 5 + 10 + 15 = 30 cm`.