A person walking at 5/6th of his usual speed is 40 minutes late to his office. What is his usual travel time to his office?
A
3 hours 20 minutes
B
3 hours 15 minutes
C
3 hours 30 minutes
D
3 hours
Correct Option - A
Explaination
Let his usual speed be x kmph,
the distance to his office be y km and
his usual travel time be t hrs.
y = xt = (5/6)x * (t+(40/60))
Solving the equation,
t = 3.33 hrs = 3 hrs 20 minutes