Friday, October 26, 2007

BOATS AND STREAMS

      b  --->  Boat speed/Man speed in water.

c ---> Current Speed/Speed of the River.

d ---> Down stream speed.

u ---> Up stream speed.

D ---> Total distance travelled.

T ---> Total time.

1.
d=b+c

2.
u=b-c

3.
b=(d+u)/2

4.
c=(d-u)/2

5.Average Speed=(2xy)/x+y      i.e
(b2-c2)/b

6.
D=[T(xy)]/x+y=[T(b2-c2)]/2b

7.
T=(D*2b)/b2-c2

8.
T=(D/d)+(D/u)=[D/(b+c)]+[D/(b-c)]

5 comments:

pkanakaraj said...

I Want More Details.

sanjay prakash said...

Good concise method good to mock up...........thanks

nayagan said...

Really this is help full for me..we need some examples...

yuvan said...

Hi! You can find lot of aptitude boats & streams questions & answers with explanation here...

http://infibee.com/general-aptitude/boats-and-streams

jobs freshers said...

thanks
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