N at a speed of 20km/h reaches his office 10 mins late. Next time he increases his speed by 5km/hr, but is still late by 4 mins. What is the distance of office from his house? :/

Any easy method to solve this thing??

  • Aveek
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Your Answer

Differences in speeds as x/20-x/25= difference in time in minutes i.e 6/60 , so it is 10kms

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