A particle moving in a straight line cov...

A particle moving in a straight line covers half the distance with a speed of `3 m s^(-1)`. The other half of the distance is covered in two equal time intervals with speeds of `4.5 m s^(-1)`, and `7. 5 m s^(-1)`, respectively. Find the average speed of the particle during this motion.

`4.0 ms ^(-1)`

`5.0 ms ^(-1)`

`5.5 ms ^(-1)`

` 4.8ms ^(-1)`

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