Q-13:Let x be the station of PI: Eleveation of PI can be expressed by 2 expressions which we can make an equation to solve for x:
240.6-2.5(x-20.10)=243.30-1.5(30.30-x)--> solve for x=23.25 so station of PI is 23+25
Answer is B
Q-14: Substitute x into either side of the equation above to...