An engineer is designing an office building. In scale drawing, the height of the building is 18 inches. The building's actual height is 990 feet. How many feet are equal to 1 inch on the drawing?

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Answer 1 · 2018-02-15T12:59:25

#55ft#

scales can be written as a ratio:

actual height : drawn height

#990# ft#:18# in

to simplify this, divide both sides by #18#.

#990/18 = 55#

#18/18 = 1#

actual height : drawn height

#55# ft#:1# in

this gives the actual height when #1# inch is drawn, which is #55# feet.