Question

A stairway consists of rises of 6 in and must reach a height of 10 feet. how many rises are needed?

Answer 1

Answer

20 rises are needed.

Explanation

To answer this, we need to first note that

1 ft = 12 inches

10 ft = 10 (12 inches) = 120 inches

So,

1 rise = 6 inches

Let 10 feet or 120 inches consist of x rises

1 rise = 6 inches

x rises = 120 inches

We can form a mathematical relationship by cross multiplying

(6)(x) = (1) (120)

6x = 120

Divide both sides by 6

(6x/6) = (120/6)

x = 20 rises

Hope this Helps!!!