A rectangular sheet of dimensions $36 c m \times 24 c m$ is taken. $864$ circular buttons of $1 c m$ diameter are made, cutting out from the sheet. Find the area of the unused sheet.

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Solution

Area of rectangular sheet $= 36 \times 24 = 864 c m^{2}$
Area of buttons $= 864 \times π {(\frac{1}{2})}^{2} = 678.58 c m^{2}$
unused area $= 185.42 c m^{2}$

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A rectangular sheet of dimensions 36 cm×24 cm is taken. 864 circular buttons of 1 cm diameter are made, cutting out from the sheet. Find the area of the unused sheet.

Area of rectangular sheet =36×24=864cm2Area of buttons =864×π(12)2=678.58cm2unused area =185.42cm2

A rectangular sheet of dimensions $36 c m \times 24 c m$ is taken. $864$ circular buttons of $1 c m$ diameter are made, cutting out from the sheet. Find the area of the unused sheet.

Area of rectangular sheet $= 36 \times 24 = 864 c m^{2}$
Area of buttons $= 864 \times π {(\frac{1}{2})}^{2} = 678.58 c m^{2}$
unused area $= 185.42 c m^{2}$