Question : A particle moving in a straight line covers half the distance with speed of 3m/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 particle during this motion is
(A) 4m/s
(B) 5m/s
(C) 5.5m/s
(D) 4.8 m/s
Answer : option (A)
Solution :
