#time
By walking at 3/4 of his usual speed a man reaches his office 20 minutes later than his usual time. The usual time taken by him to reach his office is
A) 75 minutes
B) 60 minutes
C) 40 minutes
D) 30 minutes
By walking at 3/4 of his usual speed a man reaches his office 20 minutes later than his usual time. The usual time taken by him to reach his office is
A) 75 minutes
B) 60 minutes
C) 40 minutes
D) 30 minutes