In a handkerchief of diameter 40 cm there is a border of 2 cm find area the border
Answers
Answer:
Step-by-step explanation:
diameter of the handkerchief = 40 cm
its radius = diameter/2 = 40cm/2 = 20cm
width of the border = 2 cm
total area of the circle =
= (3.14) (20)(20) square cm
=1256 cm square
area of the inner circle =
as inner radius of the circle is 2 less than the actual radius of the circle
= (3.14)(18)(18)square cm
=1017.36 square cm
area of its border = (area of the total circle - area of the inner circle )
= (1256 - 1017.36) square cm
= 238.64 square cm (answer)