Posted by sal on Monday, July 4, 2011 at 1:33pm.
A surveyor has a unit pace of 0.9 m/pace. (a) she counts 37 paces while walking From point C to point D. What is the distance between C to D? (b) how many paces should the same surveyor. count to lay out a line roughly 122m long?

math  MathMate, Monday, July 4, 2011 at 4:16pm
1 pace = 0.9 m
37 paces = x
Cross multiply to get:
x=37*0.9/1=?
When you cross multiply, multiply the complete diagonal (the one occupied by two numbers, i.e. 0.9 and 37) and divide by the number diagonally across from x, i.e. 1.
Similarly,
1 pace = 0.9 m
y paces = 122 m.
Cross multiply to get the answer.
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