Speed, Time and Distance - Quant/Math -
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Question 4 the day: September 09, 2002
The question for the day is from the topic of Speed, Time and Distance.

A man driving his bike at 24 kmph reaches his office 5 minutes late. Had he driven 25% faster on an average he would have reached 4 minutes earlier than the scheduled time. How far is his office?

(1)

24 km

(2)

72 km

(3)

18 km

(4)

Data Insufficient

Solution:

Let x km be the distance between his house and office.
While traveling at 24kmph, he would take hours. While traveling at 30 kmph, he would take hours. Therefore, (given in the problem. 5 min late + 4 min early = 9 min)
=> x = 18 km