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From a rectangular metal sheet of side 30 cm and 40cm a circular sheet as big as possible is cut off. Find the area of the remaining sheet.



Area of rectangle 30×40=12000
the biggest diameter of acircle that can be cut from this=50
therefore area of circle= 1964.2

area of remaining sheet= area of rectangle - area of circle
= 12000-1964.2=10035.8
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