Question

The circumference of two concentric circles is 176 cm and 132 cm
respectively. Find the difference between their radii.

Answer 1

Answer:

7

Step-by-step explanation:

R and R' be the radii of two circles

∴2πR−2R′=176−132

2π(R−R′)=44

∴R−R′=2×2244×7=7m

Answer 2

Answer:

7cm is the answer of question