Question

two circles are drawn inside a big circle of diameter 24 cm. the diameter of the circle are 1 by 3 and 2 by 3 of the diameter of the big circle as shown in the adjoining figure. find the ratio of areas of shaded part to the unside part of the circle. ​

Answer 1

Hey User !

=) We first calculate the diameters of the two circles.

The first circle = 24 × 1/3 = 8 cm

The second circle = 24 × 2/3 = 16 cm

The areas :

The big circle :

3.142 × 12 × 12 = 452.448 cm squared

The other circles :

3.142 × 8 × 8 = 201.088 cm squared.

3.142 × 4 × 4 = 50.272 cm squared

The unshaded = 452.448 - (201.088 + 50.272)

452.488 - 251.36 = 201.128 cm squared

Hope , It Helps ...