Answer / sanjay

In this case the distance is the CONSTANT.

Distance = time *Velocity = K
Consider the velocity in the first case as x
then x*7 = (x+12)*5
x=30.
the distance is 7x = 210 kms.

Answer / anuj pandey

s=d/t
s=x/7 where x is the distance traveled.
s+12=x/5
s=x-60/5
x-60/5=x/7 taking the value of s .
7x-420=5x
2x=420
x=210
kms is the answer

Answer / manopriya

Distance= Speed*Time
Let Distance be x
Let Train Travels a certain distance taking 7hrs in forward
journey be A*7
Let Return journey increased speed and train travels in
same distance be (A+12)*5

X= A*7= (A+12)*5
X=7A=5A+60
X=2A=60
X=A=30
X=30

Distance is 30kms

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