Question

There are 15 risers in a set of stairs running from the basement to the first floor. Each riser is 7 1/4" high. What is the distance between floors?

Answer 1

Answer: 108.75 inches or 9.0625 ft

This is equivalent to 9 ft + 0.75 of an inch, or 9 ft + 3/4 of an inch

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Work Shown:

7 & 1/4 = 7.25

Each riser is 7.25 inches tall

15 of them gives a total height of 15*7.25 = 108.75 inches

Divide that by 12 to convert to feet

108.75/12 = 9.0625 feet

9.0625 ft = 9 ft + 0.0625 ft

9.0625 ft = 9 ft + (0.0625 ft)*(12 inches/1 ft)

9.0625 ft = 9 ft + 0.75 inches

9.0625 ft = 9 ft + 3/4 of an inch