Aptitude - Clock - Discussion
Discussion Forum : Clock - General Questions (Q.No. 16)
16.
At what time, in minutes, between 3 o'clock and 4 o'clock, both the needles will coincide each other?
Answer: Option
Explanation:
At 3 o'clock, the minute hand is 15 min. spaces apart from the hour hand.
To be coincident, it must gain 15 min. spaces.
55 min. are gained in 60 min.
| 15 min. are gained in |  |
60 | x 15 |  min |
= | 16 | 4 | min. |
| 55 | 11 |
 The hands are coincident at 16 |
4 | min. past 3. |
| 11 |
Discussion:
33 comments Page 2 of 4.
Arun said:
10 years ago
@Sai.
How H=3?
How H=3?
Chandra prakash verma said:
10 years ago
As it is between 3 to 4 o'clock. So hour (H=3).
Sai said:
9 years ago
55 min are gained in 60 min means;
Take an example minute hand and hour hand at 12 o clock i.e. both coincide.
Now when hour hand moves by 1 hour it has covered only 5 degrees from the start i.e.12 o clock.
However, the minute hand covers 60 degrees from the start i.e. 12o clock.
So in 60 minutes minute hand gains 55 minutes on hour hand (i.e. 60 - 5 = 55).
Take an example minute hand and hour hand at 12 o clock i.e. both coincide.
Now when hour hand moves by 1 hour it has covered only 5 degrees from the start i.e.12 o clock.
However, the minute hand covers 60 degrees from the start i.e. 12o clock.
So in 60 minutes minute hand gains 55 minutes on hour hand (i.e. 60 - 5 = 55).
Fiza khan said:
9 years ago
I was also confused about 55 m but now I got it with the help of the explanation.
Thanks to all.
Thanks to all.
Kajal said:
9 years ago
I also confused with 55 m. Please explain it.
Subodh said:
9 years ago
@Kajal.
When minute hand covers 60 minutes that is passed by hour hand only 5 minutes space which alternatively we can say 1 hour for hour hand. But here among space covered by minute hand i.e. 60 minutes. Hour hand expenses only 5 minute equals i.e. 1 hour. So gained by minute hand is 55 minutes.
When minute hand covers 60 minutes that is passed by hour hand only 5 minutes space which alternatively we can say 1 hour for hour hand. But here among space covered by minute hand i.e. 60 minutes. Hour hand expenses only 5 minute equals i.e. 1 hour. So gained by minute hand is 55 minutes.
Josava said:
8 years ago
In that formula,
M=2/11*(30*H +- degree) 2/11(3*30) =180/11 = 16 4/11 ans.
Note coincide means 0 degree.
M=2/11*(30*H +- degree) 2/11(3*30) =180/11 = 16 4/11 ans.
Note coincide means 0 degree.
(2)
Vaibhav gupta said:
8 years ago
60/55 why it used please explain it?
Hour hand travel only 5 minutes in an hour so why we use 55 minutes.
Hour hand travel only 5 minutes in an hour so why we use 55 minutes.
Vinodh said:
8 years ago
Its very easy I am n. Vinodh kumar the formulae is x (x/11). So here x=3. We have to multiply with 5.
So 3*5=15.
Now x is 15 so as per formulae 15 (15/11) =16 (4/11).
So 3*5=15.
Now x is 15 so as per formulae 15 (15/11) =16 (4/11).
Peaceful said:
8 years ago
No, The needles only move after every second. With time unit smaller than one second, all needles stay where they are. Since 16 (4/11) minutes = 16*60 (4/11) (in second) is not a natural number, So, it cannot be the answer.
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