Waking 3 4 of his normal speed Ravi was 18 minutes late in reaching his office The usual time took t...........

Quantitative Aptitude ( CCS) Time & distance

Waking 3/4 of his normal speed, Ravi was 18 minutes late in reaching his office. The usual time took to cover the distance between his home and office was:

36 minutes

24 minutes

42 minutes

54 minutes

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Explanation:

Solution:
3/4 of speed = 4/3 of original time
4/3 of original time = original time + 18 minutes;
1/3rd of original time = 18 minutes;
Thus, original time = 18*3 = 54 minutes.