from a rectangular cardboard sheet 145 cm long and 32 cm broad, 42 circular plates each of diameter 8 cm have been cut out . finf the area of the remaining portion of the sheet.
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Area of sheet = 145×32 cm^2= 4640 cm^2
Area of 1 circle = pie × r ^2 = 22/7 × 8/2×8/2
22/7 × 4×4 = 22/7 × 16 = 50.28 cm^2 approx
Remaining area = Total Area - area of 1 circle ×42= 4640-50.28×42 = 4640 -2111.76 = 2528.24 cm^2 approx - Ans
I hope it will help you.
Area of 1 circle = pie × r ^2 = 22/7 × 8/2×8/2
22/7 × 4×4 = 22/7 × 16 = 50.28 cm^2 approx
Remaining area = Total Area - area of 1 circle ×42= 4640-50.28×42 = 4640 -2111.76 = 2528.24 cm^2 approx - Ans
I hope it will help you.
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Answer:
ans is 2528....................
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