To find the width of a canal a rod is fixed vertically on the bank so as to show 17/8 m of its length. The observer, whose eye is 17/6 m above the ground retires at right angles from the canal until he sees the top of the rod in a line with the further bank. If his distance from the nearer bank is now 10 m what is the width of the canal.
10
20
30
40
50
(all data in meter)
10
20
30
40
50
(all data in meter)
Charged up again to beat the beast 
