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:
34 comments Page 2 of 4.
Raju said:
8 years ago
Let M for a minute, T1 for the starting hour and Y for a nangle.
Then the formula be M= 2/11(T1*30- 0r + Y).
2/11(3*30+-0) because coincide means angle is zero.
2*90/11.
180/11.
16 4/11 answer.
Then the formula be M= 2/11(T1*30- 0r + Y).
2/11(3*30+-0) because coincide means angle is zero.
2*90/11.
180/11.
16 4/11 answer.
Harshitha said:
7 years ago
Thanks to all for explaining, I understand the answer.
Sumi said:
7 years ago
Thanks all for explaining.
Mohan said:
7 years ago
How 15 min space comes? if we consider 3 o clock. Please explain.
Vaibhav gupta said:
9 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.
Pavan said:
6 years ago
Thank you @sai.
Shruti said:
6 years ago
55 min is there because.
In one hour (60 min), the minute hand is 55 min ahead of the hour hand.
In one hour (60 min), the minute hand is 55 min ahead of the hour hand.
Dhinesh kumar said:
1 month ago
At first 3'o clock and 4'o'clock mean 90 degrees.
coincide means 0deg.
Now,
90 - 0/5.5 = 16.363636.
coincide means 0deg.
Now,
90 - 0/5.5 = 16.363636.
Deepak said:
1 decade ago
I can't get that 55 min. are gained in 60 min
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.
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