Aptitude - Clock - Discussion
Discussion Forum : Clock - General Questions (Q.No. 14)
14.
At what time between 4 and 5 o'clock will the hands of a watch point in opposite directions?
Answer: Option
Explanation:
At 4 o'clock, the hands of the watch are 20 min. spaces apart.
To be in opposite directions, they must be 30 min. spaces apart.
Minute hand will have to gain 50 min. spaces.
55 min. spaces are gained in 60 min.
| 50 min. spaces are gained in |  |
60 | x 50 |  min. or 54 |
6 | min. |
| 55 | 11 |
| Required time = 54 |
6 | min. past 4. |
| 11 |
Discussion:
55 comments Page 6 of 6.
Sikkanthar said:
1 decade ago
Hi @Nithya and @Ajit.
"At 4 o'clock, the hands of the watch are 20 min. Spaces apart.
To be in opposite directions, they must be 30 min. Spaces apart.
Minute hand will have to gain 50 min. Spaces".
Are you agree this statement? the same thing "to reach the 5 o'clock in the opposite direction, they must be 30mins. Space apart.
Minute hand will have to gain 55min. Spaces.
(1-2-3-...11) => (5+10+... 55).
So the answer is (60/55) *50 = 54.(6/11).
"At 4 o'clock, the hands of the watch are 20 min. Spaces apart.
To be in opposite directions, they must be 30 min. Spaces apart.
Minute hand will have to gain 50 min. Spaces".
Are you agree this statement? the same thing "to reach the 5 o'clock in the opposite direction, they must be 30mins. Space apart.
Minute hand will have to gain 55min. Spaces.
(1-2-3-...11) => (5+10+... 55).
So the answer is (60/55) *50 = 54.(6/11).
V.k said:
1 decade ago
Hi guy its very easy.
First of all at. 4 o' clock there is 120' space apart HM hand.
And for opposite direction there must be 180' space apart so,
Total is 300 space apart and the relative speed is 5.5 and the distance to Cover is 300. So, 300/5.5.
First of all at. 4 o' clock there is 120' space apart HM hand.
And for opposite direction there must be 180' space apart so,
Total is 300 space apart and the relative speed is 5.5 and the distance to Cover is 300. So, 300/5.5.
Kiranmai said:
1 decade ago
Hi frnds here this can be solve in another way also:
((5*hour)-30)(12/11) because it is straight line.
((5*4)-30)(12/11).
(-10)(12/11).
(50)(12/11).
54.(6/11).
((5*hour)-30)(12/11) because it is straight line.
((5*4)-30)(12/11).
(-10)(12/11).
(50)(12/11).
54.(6/11).
Nutan said:
1 decade ago
How it 20 min spaces comes?
Aravind said:
1 decade ago
If any tell me how is it come 30 min space apart...
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