Aptitude - Clock - Discussion
Discussion Forum : Clock - General Questions (Q.No. 7)
7.
At what time between 5.30 and 6 will the hands of a clock be at right angles?
Answer: Option
Explanation:
At 5 o'clock, the hands are 25 min. spaces apart.
To be at right angles and that too between 5.30 and 6, the minute hand has to gain (25 + 15) = 40 min. spaces.
55 min. spaces are gained in 60 min.
| 40 min. spaces are gained in |  |
60 | x 40 |  min |
= | 43 | 7 | min. |
| 55 | 11 |
 Required time = 43 |
7 | min. past 5. |
| 11 |
Discussion:
76 comments Page 7 of 8.
Priya said:
1 decade ago
Why you are consider 5 while given time is 5:30?
Saravana said:
8 years ago
How the calculation (60\55)*40 = 43*7/11?
Akki said:
1 decade ago
@Reddilavan how you got 90degree angle
Adi said:
10 years ago
Dear sir,
Please prove formula.
Please prove formula.
Ramkant said:
1 decade ago
Why the 15 min extra is added?
Nagaraj said:
1 decade ago
@red:how u got tis formula!!!
Abc said:
10 years ago
Superb formula. Thanks alot.
Dipankar Mondal said:
6 years ago
40 * 12/11 = 43 7/11.
(3)
Dinesh said:
1 decade ago
Thank you Reddilavan.
Naresh said:
1 decade ago
@red
You are great
You are great
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