Question

how would i solve this word problem, i know have to use 2 equations though
A kayaker paddled 2 hours with a 6 mph current in a river. The return trip against the same current took 3 hours. Find the speed the kayaker would make in still water.

Answer 1

Have the kayaker's speed be x. If he's going downstream, his total speed will be x+6. If he's going upstream, his speed will be x-6. To find the distance traveled in terms of x, multiply the speed by the time.
d=2x+12
d=3x-18
Since we know that he went the same distance each time, we can set these new equations equal to each other.

2x+12=3x-18
solve for x
THIS KINDA CONFUSING.. not sure yet so hold up???

Answer 2

The key to this problem is that the distance is the same downstream and upstream. From one of our favorite formulas d=rt, we will get\[2(v+6)=3(v-6)\]which is to say that the distance downstream is the same as the distance upstream. Solve for v to get your answer.

Answer 3

yeahhh @animalain got it!!

Answer 4

u both got it lol give each other a medal lol

Answer 5

katie seu bem-vindos!!!! lol!! ;p

Answer 6

lol what?!?!?! was that an instult lol

Answer 7

Did you get 30 mph?

Answer 8

yess i did!

Answer 9

hahaha insult!! lol!!! of course not!! i said ur welcome kate!! ;p

Answer 10

kATIE* SRYY

Answer 11

lol ohhh ok well good ;p and its cool

Answer 12

wats cool??

Answer 13

that u spelled my name rong lol its alright

Answer 14

ohhhhhh true! lol!! ;D

Answer 15

ppl call me kate all the time :P