Extracted text: A dumpy level with an interval focusing telescope was set up on the left bank of a river and the rod reading tabulated below were taken on a stadia rod held successively at the left and right water edges, if the K is 95.50m and stadia constant is 0.30m. Determine the width of the river. Hair Readings Rod Position Upper (a Lower (b) Rod Held at LWE 2.189 2.155 Rod Held at RWE 2.277 2.069 O 32.91m 16.617 33.91m 22.91m