Question

The slope of a soil line is quarter inch per foot if this drainage line is 50 feet long the difference in elevation from one end to the other is most nearly?

Answer 1

Since the slope of the soil line is a quarter of an inch per foot and the drainage line is 50 feet long, then the difference in elevation is:

$50\text{feet}\times\frac{1}{4}\frac{in}{feet}.$

Simplifying the above expression we get:

$\frac{50}{4}in=12.5in\text{.}$

Recall that:

$1\text{ in=}\frac{1}{12}feet.$

Therefore:

$12.5in\approx1.04\text{feet.}$

Answer: 12.5 inches= 1.04 feet.