Walking at 6/7th of this usual speed a man is 25 minutes too late. His usual time to cover this distance is
Let the initial speed and time be s,t respectively,
then speed and time in the next case are 6s/7 and (t+25)
As distance = speed * time, and distance travelled in both cases is the same,
(6s/7)*(t+25) = s*t
Solving the above equation results in t=150min
Create a FREE account and get: