Question

from a circular sheet of radius 7 cm a circle of radius 2.1 cm is removed find the area of remaining sheet

Answer 1

Hi there!
Area of remaining sheet:
Area of bigger circle - area of smaller circle
pi*R^2 - pi*r^2 = pi (R^2 - r^2)
=3.14 (7^2 - 2.1^2)
=3.14 (49 - 4.41)
=3.14 (44.59)
=140.0126 cm^2
Area of remaining sheet is 140.01 cm^2

Answer 2

140.01 answer ....... .