Question

The length of minute and second needle of a clock is 7 cm. Find the area swept by the minute and during the time from 5:15 am to 5:35 am.

Answer 1

Hie dear student your answer is here

If take out that how much angle it swipe in a minute then it is

360°/60sec= 6°

Now given time is 5:15 to 5:35

It is a duration of 20min

So , we know that in 1min or 60sec niddle swipes 6°so , 20×6 we get 120°

Now using area of sector formula we have

πr2/360

Then answer is 51.333 cm2 ( approx) .

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