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What will be the angle between the hands of the clock at 8:30?

Solution

✅ Correct Option: 2

The minute hand at 30 minutes points at the 6 on the clock.

The minute hand position from 12 o'clock:

Minute hand angle=30×6°\text{Minute hand angle} = 30 \times 6°

Minute hand angle=180°\text{Minute hand angle} = 180°


The hour hand at 8:30 is past the 8 and has moved partway toward the 9.

At 8:00, the hour hand position from 12 o'clock:

Hour hand angle at 8:00=8×30°\text{Hour hand angle at 8:00} = 8 \times 30°

Hour hand angle at 8:00=240°\text{Hour hand angle at 8:00} = 240°

In 30 minutes, the hour hand moves:

Additional movement=30×30°60\text{Additional movement} = 30 \times \dfrac{30°}{60}

Additional movement=15°\text{Additional movement} = 15°

Total hour hand position at 8:30:

Hour hand angle=240°+15°\text{Hour hand angle} = 240° + 15°

Hour hand angle=255°\text{Hour hand angle} = 255°


The angle between the hands:

Angle=∣255°−180°∣\text{Angle} = |255° - 180°|

Angle=75°\text{Angle} = 75°

Therefore, the angle between the clock hands at 8:30 is 75°75°.

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