If Arslan drives at 4/5th of his usual speed to his office, he is 6 minutes late. What is his usual time to reach his office ?

– by 0

A. 30
B. 18
C. 24
D. 36

At v1 = 4v/5 ; t1 = t + 6
4v/5 = d/(t + 6)
4v/5* (t + 6) = d
4v/5* (t + 6) = vt
On solving we get,
t = 24 minutes

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