Aptitude - Clock - Discussion
Discussion Forum : Clock - General Questions (Q.No. 4)
4.
A watch which gains 5 seconds in 3 minutes was set right at 7 a.m. In the afternoon of the same day, when the watch indicated quarter past 4 o'clock, the true time is:
Answer: Option
Explanation:
| Time from 7 a.m. to 4.15 p.m. = 9 hrs 15 min. = | 37 | hrs. |
| 4 |
3 min. 5 sec. of this clock = 3 min. of the correct clock.
 |
37 | hrs of this clock = | 1 | hrs of the correct clock. |
| 720 | 20 |
| |
37 | hrs of this clock = |  |
1 | x | 720 | x | 37 |  |
hrs of the correct clock. |
| 4 | 20 | 37 | 4 |
= 9 hrs of the correct clock.
The correct time is 9 hrs after 7 a.m. i.e., 4 p.m.
Discussion:
154 comments Page 4 of 16.
Hina said:
6 years ago
How 37/4 converts into 4?
Anyone explain please?
Anyone explain please?
Sunny singh said:
6 years ago
I think Option A will be correct.
Adharsh said:
7 years ago
Hi, I am not getting this. Please, anyone explain me to get this.
Ankit said:
7 years ago
3: 5 Sec (wrong Clock) = 3 min ( Right Clock).
Now convert 3:5 Sec into min = 3+(5/60)== 37/12 min.
37/12 min will be === to 3 min of wrong clock.
1min of wrong clock will be = 3*12/37 = 36/37min of right clock.
9:15 min will be of wrong clock ==36/37*555 ( Total time trvel = 9:15min =555min) of right clock.
= 19980/37.
= 540min.
= 9 hrs = 4 PM.
Thanks.
Now convert 3:5 Sec into min = 3+(5/60)== 37/12 min.
37/12 min will be === to 3 min of wrong clock.
1min of wrong clock will be = 3*12/37 = 36/37min of right clock.
9:15 min will be of wrong clock ==36/37*555 ( Total time trvel = 9:15min =555min) of right clock.
= 19980/37.
= 540min.
= 9 hrs = 4 PM.
Thanks.
Abhishek said:
7 years ago
Total 555min,
5 sec for 3 mins,
so total 925 sec increase,
i.e. 15mins 25 sec.
time is 4:15.
So corrected time 3 hrs 59 mins 45 secs.
5 sec for 3 mins,
so total 925 sec increase,
i.e. 15mins 25 sec.
time is 4:15.
So corrected time 3 hrs 59 mins 45 secs.
Yamini Dhanasekar said:
7 years ago
We can also solve it by;
Time from 7 a.m to 4.15 pm is 9hrs and 15 mins.
9hrs is 540 min and 15 min=555 min.
Then, how many 3 min in 555 min=555/3=185.
So, 5 sec is added 185 times.
185*5=925 sec.925 sec can be converted into 15 min(925/60=15.4 @approx 15min).
Watch shows the time at 4:15 pm.
15 min added.so the correct time is 4 PM.
Time from 7 a.m to 4.15 pm is 9hrs and 15 mins.
9hrs is 540 min and 15 min=555 min.
Then, how many 3 min in 555 min=555/3=185.
So, 5 sec is added 185 times.
185*5=925 sec.925 sec can be converted into 15 min(925/60=15.4 @approx 15min).
Watch shows the time at 4:15 pm.
15 min added.so the correct time is 4 PM.
(1)
Mayuri madavi said:
7 years ago
Find the ratio 15 sec, 1 min. Please explain this question.
Jose said:
7 years ago
How to solve 555/60 = 37/4?
Kamlesh said:
7 years ago
@Sundar.
Your explanation is in a very simple way. Thanks.
Your explanation is in a very simple way. Thanks.
Binoy Saha said:
8 years ago
3 mins clock gains 5 sec mean? Please explain it.
Post your comments here:
Quick links
Quantitative Aptitude
Verbal (English)
Reasoning
Programming
Interview
Placement Papers