Aptitude - Clock - Discussion
Discussion Forum : Clock - General Questions (Q.No. 8)
8.
The angle between the minute hand and the hour hand of a clock when the time is 4.20, is:
Answer: Option
Explanation:
| Angle traced by hour hand in | 13 | hrs = |  |
360 | x | 13 |  |
° | = 130°. |
| 3 | 12 | 3 |
| Angle traced by min. hand in 20 min. = | |
360 | x 20 | |
° | = 120°. |
| 60 |
Required angle = (130 - 120)° = 10°.
Discussion:
79 comments Page 1 of 8.
Deepti said:
2 years ago
Formula ( 30×Hrs - 11/2min),
= 30 × 4 - 11/2 × 20.
= 120 - 110.
= 10°.
= 30 × 4 - 11/2 × 20.
= 120 - 110.
= 10°.
(12)
Aaditya Pant said:
2 years ago
None of this is required. I use a basic formula, which is the absolute value of 30H- 5.5m.
Therefore, Angle = (30x4) - (5.5x20).
= 120-110.
= 10 °.
Therefore, Angle = (30x4) - (5.5x20).
= 120-110.
= 10 °.
(9)
Omkar said:
4 years ago
Just use this formula.
A = 30 * H - 5.5 * M.
Where;
A = angle.
H = hour.
M = minutes.
A = 30 * H - 5.5 * M.
Where;
A = angle.
H = hour.
M = minutes.
(7)
Anil said:
3 years ago
For 1 min the Hr hand moves 0.5,
So, the angle between Hr and Min hand is =0,
Since Min Hand moves 20 mins. We have 20*0.5=10.
Therefore 0 + 10 = 10.
So, the angle between Hr and Min hand is =0,
Since Min Hand moves 20 mins. We have 20*0.5=10.
Therefore 0 + 10 = 10.
(5)
Janhavi Neelesh Vaishampayan said:
6 months ago
The hands initially make an angle of 0 degrees.
But as the hour hand rotates 0.5 degrees per minute,
it will have made an additional 20*0.5 degrees = 10.0 degrees.
i.e. the total angle between the hands = 0+10 = 10 degrees.
But as the hour hand rotates 0.5 degrees per minute,
it will have made an additional 20*0.5 degrees = 10.0 degrees.
i.e. the total angle between the hands = 0+10 = 10 degrees.
(3)
Anuranan said:
6 years ago
It very simple.
1 Hour cover =30 °
So, 60 minutes cover 30 °.
1 minutes cover 30/60 -_1/2 °.
20 minutes cover 20 (1/2) °.
Equal to 10 °.
1 Hour cover =30 °
So, 60 minutes cover 30 °.
1 minutes cover 30/60 -_1/2 °.
20 minutes cover 20 (1/2) °.
Equal to 10 °.
(2)
Nitin said:
1 decade ago
By common sense it is clear that in 20 minutes the minute hand will move 20*6=120degree and the hour hand will move20*(1/2)=10degree.
Clearly min hand will be at 20 and hour hand will be 10degree apart.
Clearly min hand will be at 20 and hour hand will be 10degree apart.
(1)
Omkar said:
3 years ago
Short trick for these ans.
Take a ratio of 4.20=1:5 then there is a formula, when ur ratio is 1:5 then, divide minutes by 2
i.e 20÷2 = 10.
Also when ratio is 1:8 then (minute-hours) * 2
Also for the ratio 1:3, = minute * 4+minute ÷2
Ratio 1:10, θ = minute*2.5.
1:4then θ= minute*2.
1:6 θ = minute ÷2.
Take a ratio of 4.20=1:5 then there is a formula, when ur ratio is 1:5 then, divide minutes by 2
i.e 20÷2 = 10.
Also when ratio is 1:8 then (minute-hours) * 2
Also for the ratio 1:3, = minute * 4+minute ÷2
Ratio 1:10, θ = minute*2.5.
1:4then θ= minute*2.
1:6 θ = minute ÷2.
(1)
Premsai said:
9 years ago
I am not able to understand.
(1)
Ansh Shukla said:
5 years ago
How 1-hour cover 30°?
Can anyone clear this? please!
Can anyone clear this? please!
(1)
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