Question

If the circumference of a circular disc 220 mm, find its radius. Also find the area of the disc.

Answer 1

Answer:

3850mm^2

Step-by-step explanation:

The perimeter of circular disc =220mm

2πr=220mm

2x22/7xr=220mm

44/7r=220mm

r=220x7/44

r=35mm

we have got the measure of the radius

Area of circle=πr^2

area=22/7x35x25

area=3850mm^2

Answer 2

Answer:

radius = 35mm & area of disc = 3850mm²

Step-by-step explanation:

circumference of the disc = 2pi r= 220mm

=> 2x22/7 x r= 220mm

=> 2x 1/7x r= 10mm

=> r= 10x7/2

=>r=35 mm

area of disc= pi x r² =22/7 × 35 x 35

=>22× 5 x35

=> 110 × 35

=>3850 mm²

hope it helps.!!