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To solve this, you must first find the area of the whole clock. As you know, the area of a circle is found by the equation
Area = pi*(r^2)
In this equation, r stands for the radius of the circle.
We will assume that the minute hand is the radius. So then our equation is
Area = 3.14*(49) because 49 is 7 times 7.
So the area of the whole circle is 153.86 cm^2
The area traced by the hand in the time you mention is one-third of the total area. That is because there are 12 intervals on a clock face (5 minutes each). The time you mention covers 4 intervals. Therefore, the area traced is
The minute hand covers an area of pir^2 in 60 minutes So it covers an area of (35-15)/60 0r pir^2 =(20/60)pir^2 =
=(1/3)pi(7^2) cm^2 as the hour hand is 7cm lomg.
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