A drain cover is made from a square metal plate of side 40 cm and has 336 holes of radius 1 cm each drilled in it. Find the area in cm2 of the remaining square plate.(Take π =227)

A drain cover is made from a square metal plate of side 40 cm and has

1.	A drain cover is made from a square metal plate of side 40 cm and has 336 holes of radius 1 cm each drilled in it. Find the area in cm2 of the remaining square plate.(Take π =227)
Answer» A drain cover is made from a square metal plate of side 40 cm and has 336 holes of radius 1 cm each drilled in it. Find the area in ${cm}^{2}$ of the remaining square plate. (Take $π$ = $\frac{22}{7}$ )