Given :
We Have To Find Speed.
By Using Formula of Speed.
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The speed at which the ant travels is 15cm per minute.
Average speed is the total distance travelled per time. It is determined by dividing the total distance by the the total time.
Average speed = 30 / 2
= 15 cm per minute.
To learn more about average speed, please check: https://brainly.com/question/21734785