"Published in Newark, California, USA"
During a rain, ¼ in. of water fell. Find how many gallons of water fell on a level 10-acre park. (Take 1 cu. ft. = 7.48 gals. and 1 acre = 43,560 sq. ft.)
 |
| Photo by Math Principles in Everyday Life |
Solution:
Consider the given figure above
|
| Photo by Math Principles in Everyday Life |
Let's assume that the thickness of the rainwater within the level 10-acre park is ¼ in. Since the thickness of the rainwater is uniform, then the given figure is considered as a cylinder.
In this case, the area of the base which is the level 10-acre park in square feet is
The volume of the rainwater which is a cylinder is
Therefore, the volume of the rainwater in gallons is
