Question

20. The length of the minute hand of a clock is 14 cm. Find the area swept by the minute
hand in 5 minutes.
[CBSE 2013]​

Answer 1

Answer:

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Step-by-step explanation:

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working institutions are there in Indian constitution

Answer 2

Answer:

the answer is 154 cm.

Step-by-step explanation:

Minute hand completes full circle degree in 60 minutes.

Angle swept by minute in 60 minutes =360°

Angle swept by the minute hand in 15minutes =60360°×15=90°

Therefore,

θ=90°

Length of minute hand =r=14cm

Area swept by minute hand in 15 minutes = Area of sector

As we know that area of sector is given as-

A=360°θ×πr2

Therefor,

Area swept by the minute hand in 15minutes =360°90°×(722×(14)2)=41×616=154cm2

Hence the area swept by the minute hand in 15 minutes is 154cm2.

Hence the correct answer is 154cm2.