Walking at3of his usual speed, a man reaches4 his office 20 minutes late. Then his usual time for walking to his office is :

Walking at3of his usual speed, a man reaches4 his office 20 minutes la

1.	Walking at3of his usual speed, a man reaches4 his office 20 minutes late. Then his usual time for walking to his office is :
A.	1 hour
B.	30 minutes
C.	45 minutes
D.	40 minutes
Answer» B. 30 minutes

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Walking at3of his usual speed, a man reaches4 his office 20 minutes late. Then his usual time for walking to his office is :

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