At what time after 9 am, do hands of clock make a right angle?

1.	At what time after 9 am, do hands of clock make a right angle?
A.	At 32(8/11) minutes past 9 am
B.	At 9 am
C.	At 3 pm
D.	At 29(8/11) minutes before 10 am
Answer» B. At 9 am

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At what time after 9 am, do hands of clock make a right angle?

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