A) 176
B) 178
C) 180
D) 200
Correct Answer: A
Solution :
R = 15 cm, r = 13 cm. Area of the circulating ring \[=\pi \left( R+r \right)\left( R-r \right)\] \[=\frac{22}{7}(15+13)\times (15-13)\] \[=\frac{22}{7}\times 28\times 2=176\,\text{sq}\text{.}\,\text{cm}\text{.}\]You need to login to perform this action.
You will be redirected in
3 sec