Discussion :: Clock
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At what time between 7 and 8 o'clock will the hands of a clock be in the same straight line but, not together?
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A.
5 min. past 7 |
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B.
5\(\frac { 2 } {11 } \)min.past 7 |
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C.
5\(\frac {3 } {11 } \)min.past 7 |
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D.
5\(\frac {5 } {11 } \) |
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Answer : Option D
Explanation :
When the hands of the clock are in the same straight line but not together, they are 30 minute spaces apart.
At 7 o'clock, they are 25 min. spaces apart.
Minute hand will have to gain only 5 min. spaces.
55 min. spaces are gained in 60 min.
5 min. spaces are gained in[\(\frac {60 } { 55 } \)x5]min=5\(\frac {5 } {11 } \)min
Required time =5\(\frac {5 } {11 } \)min.past 7.
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