a paper is in the form of rectangle of dimension 21 cm by 15 cm a semicircle along it length is cut off the area of remaining part is is?
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a paper is in the form of rectangle of dimension 21 cm by 15 cm a semicircle along it length is cut off the area of remaining part is is?
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Answer:
The remaining Area of paper = 141.82 cm^2
Step-by-step explanation:
Area of rectangle = l × b = 21 × 15 = 315 cm^2
L = D = 21 cm
radius of semicircle = 21/2 = 10.5 cm
Area of semicircle = 1/2 × pi × r × r
= 1/2 × 3.14 × 10.5 ×10.5
=173.18 cm^2
The remaining Area of paper
= Area of rectangle - Area of semicircle
= 315 - 173.18
= 141.82 cm^2