A survey team wants to determine the difference in elevation of point A and point B using two peg test. The distance of these two points from each other is 50 meters. Where points C is 30 meters away from A and 20 meters away from B. If the instrument is set at point C. What is the value of the smaller error?

                                 Reading at A      Reading at B

Instrument near A       0.0525                 3.1818

Instrument near B      2.4859                 5.6892

Instrument at C          1.5486                 3.7254