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

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…. ☝️

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