A drain cover is made from a circular metal plate of radius 14cm habing 21 holes each of diameter 0.5cm.find the area of remaining plate
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Answer:
611.88 m²
Step-by-step explanation:
Area of the cover = πr²
Area of the cover = π(14)² = 616 cm²
Area of 1 small hole:
Area = πr²
Area = π(0.5 ÷ 2)² = 11/56 m²
Area of 21 small holes:
1 hole = 11/56 m²
21 holes = 21 x 11/56 = 4.125 m²
Area of the remaining plate:
Area = 616 - 41.25 = 611.88 m²
Answer: 611.88 m²
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