Question

i got 45:( i did something wrong.. pls help


A train headed south for Wichita left the station at the same time a train headed north for Des Moines left the same station. The train headed for Wichita traveled at 55 miles per hour. The train headed for Des Moines traveled at 70 miles per hour. How many miles apart were the trains at the end of 3 hours?

A. 210 miles
B. 165 miles
C. 125 miles
D. 375 miles

Answer 1

you know the concept of relative velocity?

Answer 2

The train headed for Wichita traveled at 55 miles per hour.
how far did it get in 3 hours ?

Answer 3

The train headed for Des Moines traveled at 70 miles per hour.
how far did it get in 3 hours ?

Answer 4

use distance = rate* time

then add the two distances

Answer 5

i got that already.. Wichita 165 miles.. the Des Moines is 210 miles... then after that idk what to do @phi & @ankit042

Answer 6

they are going in opposite directions, so add up the 2 distances

Answer 7

You have to find distance between two point A and B

Answer 8

add up two to each miles i got?

Answer 9

add the two distances. one train went north and one went south

Answer 10

375

Answer 11

yes

Answer 12

Great!

Answer 13

Does it make sense?

Answer 14

thats it!?!!?! thats the answer? i got that it the beggining jeezz haha i thought its asking for something deeper.. nvm thanks guys! @phi & @ankit042

Answer 15

haha np :)

Answer 16

so wait its asking How many miles apart were the trains at the end of 3 hours?.. doesnt it mean minus the miles i got? @ankit042 & @phi

Answer 17

just check the figure I have drawn

Answer 18

distance is always positive.

Answer 19

Trains are moving in separate direction so as time progresses distance between them will increase

Answer 20

sorry opposite not separate direction