Question

Two trains leave stations 182 miles apart at the same time and travel toward each other. One train travels at 55 miles per hour while the other travels at 75 miles per hour. How long will it take for the two trains to meet?

Answer 1

(distance apart)/(speed1+speed2)
see if it works

Answer 2

1.4 hours

Answer 3

awesome you were right with that formula!! thank ya

Answer 4

nice.. i just learned figured that out today.. id like to make sure it works all the time

Answer 5

do you know the formula to find rate?

Answer 6

rate of what?
distance/time ?

Answer 7

Two cars leave towns 510 kilometers apart at the same time and travel toward each other. One car's rate is 12 kilometers per hour less than the other's. If they meet in 3 hours, what is the rate of the slower car?

Answer 8

oh same equation.. you just need to rearrange it and use a variable for one of the speeds

Answer 9

510/12+b

Answer 10

if you do it that way.. then think of it as (12+(b-12))

Answer 11

so 12(b-12)=510?

Answer 12

im way off on this one

Answer 13

ill rearrange it for you so you can learn too..
d/(s1+s2) = t
so
d/t = s1 + s2

Answer 14

... s2 = s1-12

Answer 15

substituting ...
d/t = s1 + (s1-12)
d/t = 2s1 -12

Answer 16

does that help?

Answer 17

yes it did thank you doing more on rates soo seeing if i can keep getting them right

Answer 18

510/3 = s + s-12
170 = 2s - 12
182 = 2s
182/2 = s
91 = s

s-12 = slower car
91 - 12 = slower car

Answer 19

is that the correct answer.. im practicing too.. i by no means am any expert.. i just want to get better and this makes sense to me

Answer 20

yeah that formula you gave me was correct

Answer 21

Ravi hiked up a mountain trail and camped overnight at the top. The next day he returned down the same trail. His average rate traveling uphill was 2.4 kilometers per hour and his average rate downhill was 3.6 kilometers per hour. If he spent a total of 11 hours hiking, how long was the trail?

Answer 22

same thing for this one?

Answer 23

like 3.6+2.4= 11/?

Answer 24

rearrange the formula and see if you get the right answer bc thats what i would have done

Answer 25

oops
d= (s1+s2)t

Answer 26

did you get 66km?

Answer 27

or is that answer right?

Answer 28

no thats not the right answer

Answer 29

hmm. what is the correct answer?

Answer 30

it was like 15 something i wasnt able to get that one either

Answer 31

d=rt
where r = rate and d = distance and t = time
here is your equation..

d = t(r1*r2)/(r1+r2)