Question

Bases are located on the field 90 feet away from one another Jimmy is running at a speed of 10 ft/sec from second to third base. When Jimmy is halfway to third base, how quickly is the distance between him and home plate decreasing?

Answer 1

Here is a link to a very similar question and its solution.

Explanation:

Use the same picture, but relabel, so that B is second base, A is third and C is home plate. Also note the difference in speeds of the runners.

http://socratic.org/questions/at-what-rate-is-the-batter-s-distance-from-second-base-decreasing-when-he-is-hal?source=search