A pair of kids and a pair of adults decided to compete in a three-legged race. The kids got to start 15 meters ahead of the adults, since they had shorter legs. When they
were told to start, the kids hobbled forward at a rate of 1 meter per second, and the
adults hobbled after them at a rate of 4 meters per second. Soon they were side-by-
side. How far did the adults go? How long did that take?

A.) 25 meters; 7 seconds
B.) 5 meters; 20 seconds
C.) 7 meters; 25 seconds
D.) 20 meters; 5 seconds