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Calculating Percentages of Vertical Drop

Suppose that a county ordinance requires a 2 1/5% 'fall' for a sewage pipe from the house to the main pipe at the street. How much vertical drop to nearest foot must there be for a horizontal distance of 55 feet.?

a. 2 ft
b. 9 ft
c. 4 ft
d. 3 ft
e. 1 ft

Solution Preview

In this problem, you need to find 2 1/5 % of 55.

2 1/5 is the same ...