Question

Traveling with the current, a certain boat went 15 km/h. Against the same current, it only went 1 km/h. Find the speed of the boat in still water and the speed of the current.

Answer 1

plz help

Answer 2

hey can u help me with this one plz

Answer 3

sorry i have a few questions that I don't know how to do

Answer 4

yeah, sorry for getting here late

I think we are looking for the number that is exactly between 15 and 1

Answer 5

so do I have to find the middle number

Answer 6

yup!

Answer 7

like divide 15 by 2

Answer 8

hmmm
no... not quite


it should be the same steps as finding the average - if you know how to do that

Answer 9

i dont know how

Answer 10

6mp

Answer 11

close

Answer 12

is there an eqaution

Answer 13

add up the numbers
then divide by how many numbers there are

in this case, because we have two numbers
we do 15 + 1
then divide by 2

Answer 14

8???

Answer 15

wait... oh oh I made a mistake

Answer 16

that's my bad

we wanted the distance between the two numbers then divide by 2

so 15 - 1
then divide by 2

sorry

Answer 17

so 7??

Answer 18

yes yes :)

Answer 19

so is that the speed of the boat

Answer 20

You can also use a longer method

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15

and cross off numbers from both sides until you get to the middle

Answer 21

is it for the speed or the current

Answer 22

and yes 7 is the speed of the boat.

that is because the current is a specific speed - it is subtracting or adding to the original speed by the same amount
so 7 - 6 = 1
and 7 + 6 =15

so the speed of the river is 6
while the speed of the boat is 7

Answer 23

so the speed is 7
and the current is 6

Answer 24

yes

Answer 25

okay thank you alot!!

Answer 26

can you also explain to me2 more questions

Answer 27

and show me how to do them?

Answer 28

I've gotta go offline now, maybe someone else will be able to help

Answer 29

make a new question post for that though - we prefer to keep it as one post per question

Answer 30

oh ok thx