BOATS AND STREAMS Basics and Problems
Problems Based on Boats and Streams
To calculate the Problems based on the Boats and streams in these type of problems we have to find the Stream speed ,Man speed, Speed against the Water, Speed of Downward Stream.First we have to view some formulas regarding to these type of Problems.
FORMULA:
Man/Boat Speed in Water can be termed as = "a" kmph
Water/river/Stream/ speed can be termed as =" b" kmph
Along with Water Man/Boat Speed termed as =" a+b" kmph
Against the Water Man/Boat Speed = "a-b" kmph
we have to take a look on some of the problems relevant to:
1) The Speed of the Boat with River is 12 kmph against the river is 10 kmph Find the speed of
the Flow?
A) We Know that already a=Speed of the Boat
b=Speed of the Flow
a+b=12
a-b =10
you have to calculate by changing ths signs of them and Calculate the value for B because
we have to find the speed of the Flow.
Speed of the Flow is b=1 kmph
2) A boat can row against the stream 20 kmph speed of the flow is 8 kmph ? find the speed of the Boat?
A) in the Problem given as a-b=20 kmph and given the flow speed as 8 kmph we taken as
b=8 kmph. we taken as a-b=20 because it row's against the Stream.
Substitute the Values as a-8=20 then the value of Speed of the Boat is a= 28 kmph.
3) A Boat DownStream Speed is 36 kmph in 6 hours against the water as 40 kmph in 8 hours
Find the Speed of the Boat?
A) Downward Stream as a+b= 6 kmph ( because 36/6h= 6 kmph)
Against/Upward Stream is a-b=5 kmph (because 40/8h= 5 kmph)
We have to calculate the "a " speed of the boat Cancel the "b" value then we get "a"
value the answer of "a" is 5.5kmph (or) 11/2 kmph
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