A fish is swimming around the 720-meter perimeter of her pond. If she swims 10 laps in 120 minutes, what is her average speed in m/min?

The average speed of the fish is:

Explanation:

You must take into account that the fish swims 10 laps, so you must multiply the perimeter by 10 to obtain the total meters swam:

Now, you just must divide the total meters swam by the number of minutes that the fish took to do this, so:

Remember, ever you do an exercise like this, you must check the units, I mean, the units that the exercise wants to be the same you use, in this case, the average speed of the fish is 60 m/min.

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