If a person walks at 30 kmph he is 10 min late to his office. If he travels at 40 kmph then he reaches to his office 5 min early. Find the distance to his office.

• Let the distance to his office be d. The difference between the two timings is given as 15 min = 1 / 4 hr.
  Now if d km are covered at 30 kmph then time = d/30.
  Similarly second time = d/40.
  So, d/30 – d/40 = 1 / 4 => d = 30 km.
• 10 years agoHelpfull: Yes(3) No(1)