Question

The area difference of the two concentric circles is 770 cm and the radius of their radius is 7 cm, find the radius of both circles.

please help me.....​

Answer 1

Answer:

17cm and 7cm

Step-by-step explanation:

small circle area 154cm^2

Big circle area 770+154=924cm^2

pie(r^2)=924cm^2

big circle radius (r)=17cm (approx)

Answer 2

hey mate the answer is 17cm