Question

a train A travel at constant speed of x, behind train A about 80 miles, there is a train B travel at constant speed of thats higher than train A. after 25 minutes train B crash from behind train A.. what is the train B speed before they crash?

Answer 1

You wrote that train A travels 80 miles behind train A? Is that a typo?

Answer 2

train A travel at constant speed of x, behind train A about 80 miles there is a train B, train B travel at constant speed thats higher than train A. after 25 minutes train B crash train A from behind.. what is the train B speed before they crash?

Answer 3

help!!!!!

Answer 4

sorry i had post it later and fix data that i forgot to give

Answer 5

Do we know initially how fast A or B are going? Because I get an expression of A's speed in terms of B's. (A's speed is 192 mi/hr less than B's). lol.

Answer 6

wait

Answer 7

train A travel at constant speed of x, behind train A about 80 miles there is a train B, train B travel at constant speed thats higher than train A. after 25 minutes train B crash train A from behind, the crash is after train A travel 25miles.. what is the train B speed before they crash?

Answer 8

Oh. Ok, let me rework the problem

Answer 9

Haha ok, this problem is pretty whack. Kind of messed up if it happens in real life.

Answer 10

Can you help me?

Answer 11

Train B must have travelled (80 + 25) miles to catch up to A.
If it did that in 25 minutes, then it did that in (25/60) of an hour.
If a train travels X miles in Y hours and if it travels at constant speed,
then it’s speed is X/Y miles per hour.
So divide 105 by (25/60) to get B’s speed.

Answer 12

you mean the train B speed was 252mph and speed train A was 60mph...
the answer is absolutely correct.... thank you verifry- student91 =)
now i can sleep well =)

Answer 13

Haha. You're welcome