Basic College Mathematics (10th Edition)

Published by Pearson
ISBN 10: 0134467795
ISBN 13: 978-0-13446-779-5

Chapter 5 - Ratio and Proportion - Review Exercises - Page 376: 20


Required proportion : $\frac{1 inch}{8 ft} = \frac{7.5 inch}{x ft}$ Solution : x = 60, i.e. Actual height of the building is 60 ft.

Work Step by Step

On a scale model, 1 in. represents 8 ft. If a building in the model is 7.5 in. tall, what is the actual height of the building in feet? As per the details given: $\frac{1 inch}{8 ft} = \frac{7.5 inch}{x ft}$ (Assumed x as a required gms of medication) i.e. $1 \times x = 7.5 \times 8$ (As bot sides have same numerator and denominator) $ x = 60 $
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