Rule 2 for calculating rise-to-run ratio is stated as _____.
a. Tread width + riser height = 17" to 18"
b. Tread width + (2 × riser height) = 24" to 25"
c. Tread width + (3 × riser height) = 34" to 35"
d. Tread width × riser height = 70" to 75"
Answer: B
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