Solving Baseball Field Geometry: Understanding Distance and Speed

[booya123]

A baseball diamond is a square with side 90 ft. A batter hits the ball and runs toward first base with a speed of 25 ft/s.

(a) At what rate is his distance from second base decreasing when he is halfway to first base?
? ft/s

(b) At what rate is his distance from third base increasing at the same moment?
? ft/s

 

[fss]

What is your attempt at the solution to this problem?