Posted by **raghav** on Wednesday, June 4, 2014 at 8:02am.

A boat goes 12 km upstream and 40 km downstream in 8 hours. It can go 16 km upstream and 32 km downstream is the same time. Find the speed of the boat in still water and the speed of the stream.

- maths -
**Steve**, Wednesday, June 4, 2014 at 12:38pm
if the bot has speed b, and the stream has speed s, then since time=distance/speed,

12/(b-s) + 40/(b+s) = 8

16/(b-s) + 32/(b+s) = 8

b=6

s=2

check:

12/4 + 40/8 = 3+5 = 8

16/4 + 32/8 = 4+4 = 8

## Answer This Question

## Related Questions

- maths - A boat goes 30 km upstream and 44 km downstream in 10 hours. In 13 hours...
- word problem - A motor boat took 4 hours to make a downstream trip with a ...
- algebra - a boat goes 16 Km upstream and 24 Km downstream in 6hrs.it can go 12Km...
- algebra - a boat goes 16 Km upstream and 24 Km downstream in 6hrs.it can go 12Km...
- UPSTREAM - THIS EXURSION WITH A BOAT TRAVEL 35KM UPSTREAM AND THEN BACK AGAIN IN...
- math - A boat travels 8km upstream and back in 2 hours. If the current flows at ...
- maths - A motor boat goes downstream twice as fast as upstream. Find the power ...
- algebra - 36 Upstream, downstream. Junior’s boat will go 15 miles per hour in ...
- Maths - A river flows at 3km/h. At what speed must a boat travel in order to ...
- Physics - A boat moves through the water of a river at 5 m/s relative to the ...

More Related Questions