from a circular aluminium sheet of radius 28cm, two circles of radius 3.5cm and a rectangle of length 5cm and breadth 2cm are removed. find the area of the remaining sheet.
Answers
Answer:
2377 cm²
Step-by-step explanation:
Area of the aluminum sheet = πr²
= 22/7 × 28²
= 2464 cm²
Area of the two circles cut from the sheet = 2 × πr²
= 2 × 22/7 × 3.5²
= 2 × 38.5
= 77 cm²
Area of the rectangle cut from the sheet = l × b
= 5 × 2
= 10 cm²
Total area of sheet cut = Area of the 2 circles + Area of the rectangle
= 77 cm² + 10 cm²
= 87 cm²
∵ Total area of the aluminum sheet left = 2464 cm² - 87 cm²
= 2377 cm²
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