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Area of a Sector of a Circle

The minute ha...

Question

The minute hand of a clock is $\sqrt{21}$ cm long. Find the area described by the minute hand on the face of the clock between 7.00 AM and 7.05 AM.

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Solution

We know that the area A of a sector of circle at an angle θ of radius r is given by

.

We have,

Thus,

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The minute hand of a clock is $\sqrt{21}$ cm long. Find the area described by the minute hand on the face of the clock between 7.00 AM and 7.05 AM.

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[ 4 MARKS ]

Q. The minute hand of a clock is

10

cm long. Find the area of the face of the clock described by the minute hand between

9

9.35

Q. The minute hand of a clock is

\sqrt{21}

cm long. The area described by the minute hand on the face of the clock between

7

7.05

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