Acyclist rides at an average speed of 18 miles per hour. if she wants to bike 212 km, how long (in hours) must she ride?

7.318 hours.

Step-by-step explanation:

In order to solve this we first have to have all of our data in the same units, we will convert the 212 km into miles to be able to calculate the time it would take the cyclist:

212 km * ,621371= 131.731 miles

Now that we have the distance that he wants to cover in the same units as his average speed we just do a simple rule of three, if he covers 18 miles in an hour, how long will it take him to cover 131.731 miles?

So it will take the cyclist 7,318 hours to cover the 212 kilometers or 131.731 miles.

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