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:

Unknown said...

I Want More Details.

Unknown 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

Unknown said...

thanks
Freshers Like