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November 23, 2009
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## Problem of the Week: Unit Definitions and Conversions

A surveyor making measurements to guide a welder in the installstion of a sill on a building wall must provide a 1.40 ft minimum clearance along the property line. However, the welder requires the measurement in feet and inches. What is 1.40 ft expressed to the nearest eighth of an inch?

A. 1 ft, 3 1/8 in
B. 1 ft, 3 5/8 in
C. 1 ft, 4 3/8 in
D. 1 ft, 4 3/4 in

Solution:

The number of whole feet remains the same (1 ft). To convert 0.40 ft into inches, use a proportion.

40/100 = x/12 in
X= (12 in) (40/100)
= 4.8 in

Since the answer must be in eighths of an inch, the next step is to convert 8/10 of an inch into eighths of an inch.

8/10 = x/8
X= (8) (8/10)
= 6.4

6.4/8 in = 3.2/4 in [round to 3/4 in]

The final result, to the nearest eighth of an inch, is 1 ft, 4 3/4 in.

This is problem 2 (1-1) from the NEW third edition of “Surveying Solved Problems for the FS and PS Exams” by Jan Van Sickle, PLS (formerly "1001 Solved Surveying Fundamentals Problems"). Reprinted with permission from “Surveying Solved Problems for the FS and PS Exams” by Jan Van Sickle, PLS (2008 Professional Publications Inc.). For details on this and other FLS exam-prep books, call 800/426-1178 or visit www.ppi2pass.com

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