Discussion
At what time between 5.30 & 6 will the hands of a watch be at right angle?
Answer: A
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 must gain 40 min
55 min. spaces are gained in 60 min.
40 min. spaces would be gained in (60/55 × 40) min. = 43 7/11 min.
Required time = 43(7/11) min. past 5.
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