Question

Find the area of ring and difference of two circumference R=14cm r=7cm​​

Answer 1

Step-by-step explanation:

r=7cm,R=14cm

from r=7cm

the shape of ring is in circle

area of ring πr²=22/7x7x7=154cm²

perimeter 2πr=2x22/7x7=44cm

from R=14cm

area. πr²=22/7x14x14=616cm²

perimeter=2πr=2x22/7x14=88cm

total area is 154+616=770cm²

difference in circumferences is

88-44=44cm