Advanced Math/Speed

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Question
A motorcycle was used to clock a baseball in 1940.  The motorcycle passed the pitcher as he was starting the windup. The motorcycle had a 10 feet head start.  The baseball won by 3 feet.

Speed of motorcycle- 85 mph.

Calculate speed of baseball.

Thanks for your assistance.

Answer
The pitcher's mound is 60.5 feet from home plate.
1 mile = 5280 feet

The ball travels 60.5 feet in the time it takes the motorcycle to travel 60.5 - 13 = 47.5 feet.

47.5 feet mile/5280 feet 1 hour/85 miles = 1.0610⁻⁴ hour
It takes the motorcycle 1.0610⁻⁴ hour to travel 47.5 feet.

60.5 feet/(1.0610⁻⁴ hour) mile/5280 feet ≅ 108.3 miles/hour
The baseball travels 108.3 miles per hour.

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Janet Yang

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I can answer questions in Algebra, Basic Math, Calculus, Differential Equations, Geometry, Number Theory, and Word Problems. I would not feel comfortable answering questions in Probability and Statistics or Topology because I have not studied these in depth.

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I tutor students (fifth through twelfth grades) and am a Top Contributor on Yahoo!Answers with over 24,000 math solutions.

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Co-author of An Outline of Scientific Writing: For Researchers With English as a Foreign Language

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I have a Bachelor's degree in Applied Mathematics from the University of California at Berkeley.

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George White Elementary School. Homework Help program at the Ridgewood Public Library, Ridgewood, NJ. Individual students.

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