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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 round and are able to pick the hat at the point from where they began boating after 5min. Tell the speed of river?
Read Solution (Total 4)
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- Let speed of boat be V & strean be U
In return downstream they travelled with speed of V+U for 5 min (1/12 hr)
and covered a distance equal to that travelled in upstream with speed V-U for 5 min (1/12 hr) plus 1 mile travelled.
so (V+U) *1/12 = (V-U) *1/12 +1
Hence U =6 mph - 10 years agoHelpfull: Yes(13) No(1)
- The hat fallen after travelling one mile and after that they
travelled for (5MIN.)
so that hat travelled down stream for one mile and they
collected the hat after 5mins of travel down stream. So the
total time they spent after losing hat is 10 minutes.In this
10 minutes the hat exactly traveled 1 mile(i.e with river
speed). So its very clear----> the river speed is 6miles/hour. - 11 years agoHelpfull: Yes(8) No(2)
- can u explain plzzzz @ponnarasi
- 10 years agoHelpfull: Yes(3) No(0)
- Cap fell here
A-------------->B----------------->C Upstream-------->
1mile
-----5 min--------
A - 13 years agoHelpfull: Yes(0) No(13)
CTS Other Question
Find out the wrong number in the series.
7, 8, 18, 57, 228, 1165, 6996
A. 8
B. 18
C. 57
D. 228
In a group of persons travelling in a bus, 6 persons can speak Tamil, 15 can speak Hindi and 6 can speak Gujarati. In that group, none can speak any other language. If 2 persons in the group can speak two languages and one person can speak all the three languages, then how many persons are there in the group?
A) 21 B) 23 C) 22 D)24