A particle moving in a straight line covers half the distance with speed of `3 m//s`. The other half of the distance is covered in two equal time intervals with speed of `4.5 m//s and 7.5 m//s` respectively. The average speed of the particle during this motion is :

Options

A. `4.0 m//s`
B. `5.0 m//s`
C. `5.5 m//s`
D. `4.8 m//s`

Answer

A