Question

A train traveled 300 miles. How long did the trip take if the train was traveling at a rate of 50 mph?

Answer 1

time=distance /speed
does this help ?

Answer 2

d = r*t
d = 300, r = 50, what is t?

Answer 3

so t should = 6 ..right ?

Answer 4

The basic equation is :-
Speed(S) = Distance(D) / Time(T)

S = D/T
This can be algebraically re-arranged:-
D = S x T
Distance = Speed x Time

&
T = D/S
Time = Distance / Speed

Answer 5

right t=6 hours

Answer 6

thanks guys :)

Answer 7

what if the rate is 70 mph? I tried the same process with that but it came out weird

Answer 8

t = d/r so d = 300 and r = 70 what did you get?

Answer 9

its not going to be a nice number like 6

Answer 10

yeah I noticed lol should I just round the number I received?

Answer 11

what is it?

Answer 12

I divided 300 by 70 and got this

Answer 13

note if is hours your looking for and you get something like 6.7 you would want to find out what .7 of 1 hour is (7/10)*60 = 7*6 = 42 so 6.7 would be 6 hours and 42 minutes

Answer 14

right, so you have 4.28 hours. find out what .28 of an hour is

Answer 15

.28*60 = (28/100)*60 = ?

Answer 16

I dont know if your teacher wanted you to do this, but its a good excercise. you could just call it 4.28 hours. but giving a clean answer would be better imo.

Answer 17

well I do school online.. and so they don't show us much. I would think either answer would be fine

Answer 18

I'm going to try the clean answer

Answer 19

i would think so.

Answer 20

ok tell me what you get

Answer 21

it keeps giving me 16.8

Answer 22

so 16.8 minutes so we are looking at about 4 hours and 16 minutes.

Answer 23

you could find out how much of a min is .8 if you wanted and give it down to the second, but I think thats going a little to far:)

Answer 24

alright, that's what I thought it would be

Answer 25

lol yeah I don't my school cares about the seconds ..so 4 hours and 16 minutes it is ^.^

Answer 26

on one they gave me x mph for a rate.. should x count as 1? How would I do that ?

Answer 27

can you show the exact question?

Answer 28

A train traveled 300 miles. How long did the trip take if the train was traveling at a rate of x mph? its the same question with a different rate

Answer 29

when the rate was 50 we said t = 300/50
when the rate was 70 we said t = 300/70
when the rate is x we say t = 300/?

Answer 30

300/x ? I don't understand how to work that problem

Answer 31

correct

Answer 32

its just a variable x can be anything.

Answer 33

so should the answer just be x ?

Answer 34

no you said it already

Answer 35

if x = 50 its 300/50 if x = 234567864 then its 300/234567864 if x = x then its 300/x

we do not have a value for x. so it acts as a place holder. Just like if I said y = 54x+2
if x = 2 its 45(2)+2 if x = 54 its 45(54)+2 if x=x(or we are given no value for x) its 45x+2

Answer 36

well for the answer I type in how long the trip would take.. for this should i just put x ? would that be a correct answer?

Answer 37

no t = 300/x so time = 300/x

Answer 38

because the next one is (x+20)mph ..so i would assume that would be 20x

Answer 39

i must go to sleep

time will always be t = distance/rate what ever they give you for the rate put that where the word rate is

so if the rate was 45x+7654y+43243+dog+cat then you would have
t = 300/(45x+7654y+43243+dog+cat )

Answer 40

okies :) I understand now ^.^ thank you soo much for helping me :)