Home » Aptitude » Speed, Time and Distance » Question
  1. Walking at
    3
    of his usual speed, a man reaches
    4
    his office 20 minutes late. Then his usual time for walking to his office is :
    1. 1 hour
    2. 30 minutes
    3. 45 minutes
    4. 40 minutes
Correct Option: A

Usual time = x minutes

New time =
4x
minutes
3

∵  Speed ∝
1
Time

According to the question,
4x
− x = 20
3

⇒ 
x
= 20
3

⇒  x = 60 minutes i.e. 1 hour.


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