Two level sections 100 ft apart with center heights 4.2 and 5.6 ft in cut, base width 30 ft, side slopes 1.5:1. Calculate earthwork volume in yd3 usin

Step-by-step explanation:

The problem statement isn't clear as to which unit is 1 in your unit rate. If it is 1 cm, you can find the unit rate by multiplying the reationship by 4:

... 4 × (1/4 cm to 10 m) = 1 cm to 40 m

If it is 1 m, you can find the unit rate by multiplying the relationship by 1/10:

... 1/10 × (1/4 cm to 10 m) = 1/40 cm to 1 m

Additional comment on the problem

Ordinarily, drawing scales are expressed as a fraction. Here, that would be ...

(1/4×1/100 m)/(10 m) = 1/4000 . . . or . . . 1 : 4000