Question

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?​

Answer 1

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