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R O S E B E D O R P O O L ??? (Math in E V E R Y D A Y L I F E) Dr. Robert J. Rapalje Seminole State College of Florida Sanford, FL 32773
1. Now that Dr. Rapalje is retired, he is digging a circular hole in his yard!! The hole is to be 18 feet across and 18 inches deep. How many cubic yards of dirt must be removed from the hole?
Everyday Solution: To
find the amount of dirt to be removed, you have to multiply the
depth of the hole
times the area of the
circle, and put
everything into the same units, preferably yards, since you want to know how
many cubic yards of dirt to remove.
Area of a circle
is a common formula, (That’s the final answer, and for a senior citizen without a back hoe, that’s a LOT of dirt!!)
Math Solution: The basic formula needed for this problem is the volume of a cylinder, which is
Substitute all the values, and it looks like this:
Get
out a calculator, and you get approximately
2. Is he digging a swimming pool or a rose bed? Click here for the answer!
Follow-up Math Problems -- Click here!
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