two trains start simultaneously in opposite directions from two stations A and B which are 400km apart.the speed of one of the trains is 5km

Question

two trains start simultaneously in opposite directions from two stations A and B which are 400km apart.the speed of one of the trains is 5km/h greater than the other.After 2 hours,if the distance between the two trains is 90km,find the speed of the faster train.
STEP BY STEP EXPLANATION ​

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Camila 4 weeks 2021-08-17T16:44:38+00:00 2 Answers 0 views 0

Answers ( )

    0
    2021-08-17T16:46:01+00:00

    Answer:

    Bro correct answer is 80km per hour

    Step-by-step explanation:

    Let speed of one train is = x

    then speed of other train will be = x+5

    if the distance between them after 2 hours is 90 km then they had travelled 310 kms in total

    since distance = speed x time

    310 = [speed of first train x 2] + [speed of second train x 2]

    310 = [x*2] + [x+5*2]

    310 = 2x + 2x +10

    310 = 4x + 10

    310 – 10 = 4x

    300 = 4x

    300/4 = x

    75 = x

    therefore speed of first train is 75 and second train is 80

    This is only the correct answer…. ☝️

    0
    2021-08-17T16:46:30+00:00

    Answer:

    Let speed of one train is = x

    then speed of other train will be = x+5

    if the distance between them after 2 hours is 90 km then they had travelled 310 kms in total

    since distance = speed x time

     

    310 = [speed of first train x 2] + [speed of second train x 2]

    310 = [x*2] + [x+5*2]

    310 = 2x + 2x +10

    310 = 4x + 10

    310 – 10 = 4x

    300 = 4x

    300/4 = x

    75 = x

    therefore speed of first train is 75 and second train is 80

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