GATE EC 2016 Set 2 — Question 8
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General Aptitude → Analytical Aptitude → Numerical Relations & Reasoning
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Question
Two and a quarter hours back, when seen in a mirror, the reflection of a wall clock without number markings seemed to show 1:30. What is the actual current time shown by the clock?
Correct answer
(D) 12:45
Solution
To find the actual time from a mirror image, we subtract the mirror time from 11:60 (which is equivalent to 12:00).Mirror time shown = 1:30Actual time (two and a quarter hours back) = 11:60 - 1:30 = 10:30The problem states that this time (10:30) was "two and a quarter hours back".
Two and a quarter hours = 2 hours and 15 minutes.To find the current time, we add 2 hours and 15 minutes to 10:30.Current Time = 10:30 + 2 hours 15 minutes
Current Time = (10 + 2) hours : (30 + 15) minutes
Current Time = 12 hours : 45 minutes
Current Time = 12:45The final answer is
Two and a quarter hours = 2 hours and 15 minutes.To find the current time, we add 2 hours and 15 minutes to 10:30.Current Time = 10:30 + 2 hours 15 minutes
Current Time = (10 + 2) hours : (30 + 15) minutes
Current Time = 12 hours : 45 minutes
Current Time = 12:45The final answer is
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