A tortoise is walking in the desert. It walks at a speed of 5 meters per minute for 12.5 meters. For

A tortoise is walking in the desert. It walks at a speed of 5 meters per minute for 12.5 meters. For how many minutes does it walk?

Distance formula (d) for a rate (r) and time (t) is:
d = rt

We're given d = 12.5 and r = 5
12.5 = 5t
5t = 12.5

Solve for t. Divide each side of the equation by 5:
5t/5 = 12.5/5

Cancel the 5's on left side and we get:
t = 2.5