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 4 of 8.
Nagu said:
10 years ago
Why the spaces are same for 5'clock and 7'clock == 25 spaces?
In which direction we have to take the spaces clock wise or anti clock wise?
In which direction we have to take the spaces clock wise or anti clock wise?
Chan said:
1 decade ago
@Amit.
If the hour is equal to 6, then what is the formula for that.
Is it the angle 180 for straight angle and 90 for right angle.
If the hour is equal to 6, then what is the formula for that.
Is it the angle 180 for straight angle and 90 for right angle.
A v said:
1 decade ago
@Aaaa.
Because hour hand will move too as 40 mins passes by. Thereby, no chance to get an exact 90 ° formation between hands.
Because hour hand will move too as 40 mins passes by. Thereby, no chance to get an exact 90 ° formation between hands.
Siri said:
1 decade ago
Acc to formula in 60 min we gain 55 spaces
So, for 1min = ?
60min=55 gains
1min=?
so by cross multiplicatn
we get
60/1x55=60/55
So, for 1min = ?
60min=55 gains
1min=?
so by cross multiplicatn
we get
60/1x55=60/55
Deepika said:
1 decade ago
There is a direct formula for it...
30xH + 11/2xM where H is for hours and M is minutes..
for e.g. in 4.20 pm....
H= 4
M= 20
30xH + 11/2xM where H is for hours and M is minutes..
for e.g. in 4.20 pm....
H= 4
M= 20
Ranjeesh said:
1 decade ago
@Reddilavan your formula is ok. But why are you take only the number 5 in our west. Time give 5.30. Any one can explain?
MATH EXPERT said:
9 years ago
FORMULA :
Guess P = ANS .
(11/2) x (minutes) - 30 x (Hours) = 90 degree.
11/2 x P - 30 x 5 = 90,
P = 480/11= ANS.
Guess P = ANS .
(11/2) x (minutes) - 30 x (Hours) = 90 degree.
11/2 x P - 30 x 5 = 90,
P = 480/11= ANS.
(1)
Renuga said:
3 years ago
At what time between 5 and 60' clock the hands of a clock will make an angle of 40%?
Anyone, explain the answer.
Anyone, explain the answer.
Lakhan singh meena said:
9 years ago
Direct formula:
6*x - 90 = 30(y + x/60);
Where y = 5 hr.
So 6x = 30(5 + x/60) + 90;
x = 43(7/11)min. past 5.
6*x - 90 = 30(y + x/60);
Where y = 5 hr.
So 6x = 30(5 + x/60) + 90;
x = 43(7/11)min. past 5.
Abhishek said:
1 decade ago
@Reddilavan
It seriously a gud formula... we would be obligeed if we have more such formulae from your end.
It seriously a gud formula... we would be obligeed if we have more such formulae from your end.
Post your comments here:
Quick links
Quantitative Aptitude
Verbal (English)
Reasoning
Programming
Interview
Placement Papers