Question

At what time shown in the options, the hour hand and the minute hand of your clock will be perpendicular to each other?

• A. $03:00$
• B. $06:15$
• C. $03:30$
• D. $11:00$

Answer 1

The correct option is A $03:00$

At $03:00$, hour hand and minute hand are at right angles to each other. At all the other instances, the minute hand has moved, so the hour hand would have moved too. Hence, the angle formed will not be ${90}^{\circ }$ in those cases.