Question 303234
Walking beside you, your friend takes 50 strides per minute while you take 48 strides per minute.
 If you start in step, when will you be in step again?
:
Let m = no. of minutes to be in step
50(m-1) = 48m
50m - 50 = 48m
50m - 48m = 50
2m = 50
m = 25 minutes
:
therefore in 25 min you will be in step because:
your friend has completed 25*50 = 1250 steps 
while you have completed 25*48 = 1200 steps