Question

A saucer has a radius of 8 cm. A plate has a radius of 12 cm. How much greater circumference of the plate than the circumference of the saucer?

Answer 1

`color(violet)("Diff. in circumferences " C_d = C_p - C_s = 8pi ~~ 25.13 cm`

Explanation:

`color(crimson)("Circumference of a circle " C = 2 * pi * r`

`"Given : radius of saucer " r_s = 8 cm, "radius of plate " r_p = 12 cm`

`:. "Circumference of saucer " C_s = 2 pi * 8 = 16 pi " cm"`

`:. "Circumference of plate " C_p = 2 pi * 12 = 24 pi " cm"`

`color(violet)("Diff. in circumferences " C_d = C_p - C_s = 24pi - 16pi = 8pi ~~ 25.13 cm`