Related Articles
QA – Placement Quizzes | Clocks Clocks Clocks | Question 14
• Last Updated : 13 May, 2016

A faulty clock gains 5 seconds in every 3 minutes. Ram set it right at 8:00 AM. What is the true time when the clock indicates quarter past 5 o’clock of afternoon?
(A) 4:30 PM
(B) 7:00 PM
(C) 5 :00 PM
(D) 3:00 PM

Explanation: quarter past 4 o’clock of afternoon is 5:15 PM

Time duration from 8:00 AM to 5:15 PM = 37/4 hrs

3 min 5 sec of this clock means = 3 min of correct time

3 min 5 sec. = 37/720 hrs

3 min = 1/20 hrs

• 37/720 hrs of this clock = 1/20 hrs of correct time
• 37/4 hrs of this clock = (1/20)*(37/4)/(37/720) = 9 hrs of correct time
• So the correct time = 8:00AM + 9 hrs = 5 PM

Quiz of this Question
Please comment below if you find anything wrong in the above post

Attention reader! Don’t stop learning now. Get hold of all the important DSA concepts with the DSA Self Paced Course at a student-friendly price and become industry ready.

My Personal Notes arrow_drop_up