at what time between 5:30 and 6 will the hand of a clock be at right angles? A . 43 5/11 min. past 5 B . 43 7/ 11 min. past 5 C . 40 min. past 5 D . 45 min. past 5
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Answer:
option B
Step-by-step 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
=(60/55×40)min.
=43 7/11min.
∴Required time=43 7/11min.past5
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