The back staff reading on a B.M. of R.L. 500.000 m is 2.685 m. If foresight reading on a point is
1.345 m, the reduced level of the point, is
(A) 502.685 m
(B) 501.345 m
(C) 501.340 m
(D) 504.030 m
1.345 m, the reduced level of the point, is
(A) 502.685 m
(B) 501.345 m
(C) 501.340 m
(D) 504.030 m