A son and father goes for boating in river upstream . After
rowing for 1 mile son notices the hat of his father falling
in the river. After 5 min. he tells his father that his hat
has fallen. So they turn around and are able to pick the
hat at the point from where they began boating after 5 min.
Find out the speed of river.
6 miles per hour…….
actually hat fell when they were 1 mile away from starting
and total time hat takes to travel to the starting point is
10 minutes ( 5 + 5 ).so, 1 miles per 10 minutes thats why 6
miles per hour
Cap fell here
A————–>B—————–>C Upstream——–>
1mile
—–5 min——–
A<-----<<-------B<--------<<------C <<------Downstream
---------------5 min---------------
cap reached
here
From B to A total time taken by cap to reach at A =5+5
=10 min (B-->C–C–>B–>A)
Total distance covered by capto reach frm B to A =1 mile (with speed of river)
so speed of river =1 mile/ 10 min
= 1/(10/60)hr
=6 mile/hr Ans
6 miles per hour…….
actually hat fell when they were 1 mile away from starting
and total time hat takes to travel to the starting point is
10 minutes ( 5 + 5 ).so, 1 miles per 10 minutes thats why 6
miles per hour
Cap fell here
A————–>B—————–>C Upstream——–>
1mile
—–5 min——–
A<-----<<-------B<--------<<------C <<------Downstream ---------------5 min--------------- cap reached here From B to A total time taken by cap to reach at A =5+5 =10 min (B-->C–C–>B–>A)
Total distance covered by capto reach frm B to A =1 mile (with speed of river)
so speed of river =1 mile/ 10 min
= 1/(10/60)hr
=6 mile/hr Ans