a roof rises 1.9 feet vertically and 7 feet horizontally. what is the grade of the roof?
To find the grade of a roof, you need to calculate the ratio between the vertical rise and the horizontal run. The grade is usually expressed as a percentage or a decimal.
In this case, the roof rises 1.9 feet vertically and runs horizontally for 7 feet. To find the grade, divide the rise (1.9 feet) by the run (7 feet):
Grade = Rise/Run
Grade = 1.9 feet / 7 feet
Now, we can simplify the fraction by dividing both the numerator and denominator by the greatest common divisor, which is 0.1:
Grade = (1.9/0.1) feet / (7/0.1) feet
Grade = 19/70
As a decimal, the grade of the roof is approximately 0.2714 (rounded to four decimal places). To express it as a percentage, multiply the decimal by 100:
Grade = 0.2714 * 100
The grade of the roof is approximately 27.14%.