Question

A rectangular pool is 18 meters wide and 24 meters long. If you swim diagonally across the pool, how many meters would you be swimming?

Answer 1

Using the Pythagorean theorem, the diagonal measure is found as
  √((18 m)² +(24 m)²) = √(324 +576) m = √900 m
  = 30 m

You would be swimming 30 meters.