If the back fill is having a uniform surcharge of intensity q per unit area, the lateral pressure will be

ANS:C - equal to a fill of height Z equal to q/r, where r is the density of the backfill

Z is the equivalent ht of backfill giving the same effect as that of surcharge.

Ka r Z = ka q.
Z = q/r, where z is the equivalent ht n r is the density.