7th Class
Mathematics
Perimeter and Area
Question Bank
Perimeter and Area
question_answer
What is the difference of circumferences of the circles shown?
A) 22 cm
B) 20 cm
C) 24cm
D) 26cm
Correct Answer:
A
Solution :
Radius of outer circle \[=14\text{ }cm\] \[\Rightarrow \] Circumference \[=88\text{ }cm\] Radius of inner circle \[=14-3.5=10.5\text{ }cm\] \[\Rightarrow \]Circumference = 66 cm \[\therefore \] Difference of circumferences \[=88-66\text{ }cm=22\text{ }cm\]