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1.For a 400-foot sag curve connecting a 1 1/2% with a +3 % grade, the distance from beginning of the curve to the lowest point
1.For a 400-foot sag curve connecting a 1 1/2% with a +3 % grade, the distance from beginning of the curve to the lowest point is?
a.120 ft.
b.130 ft.
c.140 ft.
d.150 ft.
e.160 ft.
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