Correct Answer - B
Let after time t, car catches the scooter and the distance travelled by scooter in time t
`x=(1)/(2)xx(1)xxt^(2)=(t^(2))/(2)` ….(i)
The distance travelled by car in time t
`x+150=(1)/(2)xx2xxt^(2)=t^(2)` ….(ii)
Solving Eqs. (i) and (ii), we get
`t=sqrt(300)s`