Answer to Question #38365 in Mechanics | Relativity for Muhammad Amjad

Question

im stands beside a wide river and wonder how wide it is.he spots a large clock on the bank directly across from him. he then walk upstrem d=36 strides and judges that the angle between him and the rock, which he can still see,is now at the angle of 30 degree downstream. jim measures hi stride to be about 0.8 m long