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The average speed of the object over the 15 seconds (s) is equal to the distance travelled divided by the time taken.

Therefore the speed of the object = 27/15 or 1.8 metres per second (m/s)

It is important to note that this is the average speed and not the speed at any particular point in time.

The object's speed can also be expressed in km/h by multiplying our answer by 3.6. So object's speed = 1.8 * 3.6 = 6.48 km/h

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12y ago

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