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Step-by-step explanation:
radius of semi-circle = 70cm
Area of rectangle= l×b = 200cm × 140 cm = 2800cm²
Area of semi circle= pi×r²/2
= 2450×22/7 cm² =7700 cm²
total area of window = area of semi circle + area of rectangle= 2800+ 7700= 10500cm²
Net required to cover the window = area of window
= 10500cm²
Net required to cover 2 windows = 2× 10500
=21000cm²
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Hope this is helpful friend
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