1its a simple sum from dc pandey
initially the vel is perpendicular to the flow so the toal drift is 2*t where t is the time obvousy t is 100/4=25s thereofre =50m
now it has to move in a direction so that the drift becomes 50m in the opp direction
let the anfle be @ with the perpendicular so vel along the horizontal direction is 4sin@ and along the normal 4cos@
time taken to reach the other end is 25/cos@ (simple math)
now drift will be 4sin@-2*25/cos@=50m
hope u cna solve after it if u cant then tel me in my chatbox i will post the full solution....
1
varun.tinkle
·2009-12-03 03:19:11
its a simple sum from dc pandey
initially the vel is perpendicular to the flow so the toal drift is 2*t where t is the time obvousy t is 100/4=25s thereofre =50m
now it has to move in a direction so that the drift becomes 50m in the opp direction
let the anfle be @ with the perpendicular so vel along the horizontal direction is 4sin@ and along the normal 4cos@
time taken to reach the other end is 25/cos@ (simple math)
now drift will be 4sin@-2*25/cos@=50m
hope u cna solve after it if u cant then tel me in my chatbox i will post the full solution....
