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Question

At 5:20 the angle formed between the two hands of a clock is

A
obtuse
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B
right
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C
acute
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D
none of these
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Solution

The correct option is C acute
A clock is a circle, and a circle always contains 360o. Since there are

60 minutes on a clock, each minute mark is 6o.

360o60=6degree
The minute hand on the clock will point at 20 minutes, allowing us to calculate it's position on the circle.

20minutes×6=120degree
So the angle made by the hour hand in 5 hours 20 minutes =513hours
=163×360o12
=160o

Hence angle between the hour hand and minute hand at 5:20=160o120o=40o

40o is less than 90o means its acute angle.

At 5:20 the angle formed between the two hands of a clock is acute.

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