By walking at 3/4 of his usual speed , a man reaches his office 20 minutes later than usual . this usual time is ?

By walking at 3/4 of his usual speed , a man reaches his office 20

1.	By walking at 3/4 of his usual speed , a man reaches his office 20 minutes later than usual . this usual time is ?
A.	30 minutes
B.	60 minutes
C.	75 minutes
D.	1 hour 30 minutes
Answer» C. 75 minutes

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By walking at 3/4 of his usual speed , a man reaches his office 20 minutes later than usual . this usual time is ?

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