In a school, exactly at the middle of the stage of the assembly hall, after drawing a circle of $2.8 m$ radius, a beautiful picture is to draw in it. Cost for drawing is $R s . 300$ per $1 s q m$ . What is the total cost(in Rs) of drawing a picture in this circle?

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Solution

Radius of circle $(r) = 2.8 m$
Area of circle $= π r^{2} = \frac{22}{7} \times (2.8)^{2} = 24.64 m^{2}$
Now, Cost of drawing $= R s . 300 per s q . m$
$∴$ Cost of drawing $24.64 m^{2} = R s . 300 \times 24.64 = R s . 7392$

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In a school, exactly at the middle of the stage of the assembly hall, after drawing a circle of 2.8 m radius, a beautiful picture is to draw in it. Cost for drawing is Rs.300 per 1 sq m. What is the total cost(in Rs) of drawing a picture in this circle?

Radius of circle (r)=2.8 mArea of circle =πr2=227×(2.8)2=24.64 m2Now, Cost of drawing =Rs. 300 per sq.m∴ Cost of drawing 24.64 m2=Rs.300×24.64=Rs. 7392

In a school, exactly at the middle of the stage of the assembly hall, after drawing a circle of $2.8 m$ radius, a beautiful picture is to draw in it. Cost for drawing is $R s . 300$ per $1 s q m$ . What is the total cost(in Rs) of drawing a picture in this circle?

Radius of circle $(r) = 2.8 m$
Area of circle $= π r^{2} = \frac{22}{7} \times (2.8)^{2} = 24.64 m^{2}$
Now, Cost of drawing $= R s . 300 per s q . m$
$∴$ Cost of drawing $24.64 m^{2} = R s . 300 \times 24.64 = R s . 7392$