Monday

March 30, 2015

March 30, 2015

Posted by **bert** on Tuesday, January 8, 2008 at 8:34pm.

Please help me, the answer is 36 km but i have no idea how to set it up

- MATH!!!!!!! -
**drwls**, Tuesday, January 8, 2008 at 8:50pmLet D be the distance travelled. The total time moving was 7 - 2 = 5 hours.

Realize that time time spent travelling in one direction is D/V, where V is the speed.

Here is what you know:

D/12 + D/18 = 5 hours

Create a common denominator.

(3D + 2D)/36 = 5

5D/36 = 5

D = 36 km

**Answer this Question**

**Related Questions**

UPSTREAM - THIS EXURSION WITH A BOAT TRAVEL 35KM UPSTREAM AND THEN BACK AGAIN IN...

algbra - a paddle boat can move at a speed of 14 km/h in still water. the boat ...

Maths - A river flows at 3km/h. At what speed must a boat travel in order to ...

RATE, DISTANCE, TIME - TIM PADDLED HIS KAYAK 12 KM UPSTREAM AGAINST A 3 KM/H ...

math (algerba 1) - A motorboat can travel upsteam on a river at 18km/h and ...

math (algerba 1) - A motorboat can travel upstream on a river at 18km/h and ...

Please help - A motorboat can travel upsteam on a river at 18km/h and downsteam ...

algebra - Abby Tanenbaum paddled her canoe 10 miles upstream, adn then paddled ...

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...