A circle of diameter 14 cm was cut out of a square of cardboard with 20 cm sides. How do you find the area of the remaining piece of cardboard?

1 Answer
Nityananda
May 30, 2017

246 sq cm

Explanation:

Area of cupboard = 20*20 sq cm = 400 sq cm.

Dia. (2r) = 14 cm. So radius (r) = 14/2 = 7 cm

Area of circle = #pi r^2 = 22/7*7^2 = 154# sq cm

Area of remaining piece of cupboard = 400 - 154 = 246 sq cm

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