Q.54) Two points A and B are 1530 m part across a river. The reciprocal levels measured are Level Reading on (in m at A B A 2.165 3.810 B 0.910 2.355 The true difference in level between A and B would be a) 1.255 m b) 1.355 m c) 1.545 m d) 1.645 m