Aptitude - Clock - Discussion
Discussion Forum : Clock - General Questions (Q.No. 5)
5.
How much does a watch lose per day, if its hands coincide every 64 minutes?
Answer: Option
Explanation:
55 min. spaces are covered in 60 min.
| 60 min. spaces are covered in |  |
60 | x 60 |  min. |
= 65 | 5 | min. |
| 55 | 11 |
| Loss in 64 min. = | |
65 | 5 | - 64 | |
= | 16 | min. |
| 11 | 11 |
| Loss in 24 hrs = | |
16 | x | 1 | x 24 x 60 | min. |
= | 32 | 8 | min. |
| 11 | 64 | 11 |
Discussion:
119 comments Page 7 of 12.
Karan singh saud said:
9 years ago
Very simple question.
A clock coincides 11 times in 12 hrs (720 min).
So, per meeting =720/11 (65.45).
i.e hands coincide after every 65.45 min.
But according to the question. Hands coincide every 64 min.
So clock losses 1.45 min for every meeting.
And we know that hands coincide 22 times a day.
So. Answer = 22 * 1.45. (I guess this is correct).
A clock coincides 11 times in 12 hrs (720 min).
So, per meeting =720/11 (65.45).
i.e hands coincide after every 65.45 min.
But according to the question. Hands coincide every 64 min.
So clock losses 1.45 min for every meeting.
And we know that hands coincide 22 times a day.
So. Answer = 22 * 1.45. (I guess this is correct).
(1)
Shiva said:
9 years ago
Use this you will get any problem solved from clock M * 6° ~ (h + m/60) * 30°= Angle.
Sapnaa said:
9 years ago
It actually does not cover 55 min space in 1 hr it covers 56.25 min space in 1 hr.
Krishna said:
9 years ago
How could you all get 720/11 - 64 = 16/11? Please explain.
Vijeshri said:
9 years ago
@Krishna
64 * 11= 704.
720 - 704/11 = 16/11.
64 * 11= 704.
720 - 704/11 = 16/11.
Anonymous said:
9 years ago
I didn't understand. Please clarify me.
ROHIT DUBEY said:
9 years ago
Please solve it by the tricky method.
Vishal said:
9 years ago
Well done @Konxie.
Akgarhwal said:
9 years ago
Watch coincide every 65 5/11 min
Loss in 64 minutes= (65 5/11- 64)= 16/11
Loss in 1 minute= (16/11) * (1/64)
Loss in 60 minute or 1 hr = (16/11) * (1/64) * 60,
Loss in a day or 24 hours = (16/11) * (1/64) * 60 * 24 = 32 8/11 min.
Loss in 64 minutes= (65 5/11- 64)= 16/11
Loss in 1 minute= (16/11) * (1/64)
Loss in 60 minute or 1 hr = (16/11) * (1/64) * 60,
Loss in a day or 24 hours = (16/11) * (1/64) * 60 * 24 = 32 8/11 min.
(1)
Chetan minajigi said:
9 years ago
Thanks @Maddy.
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