The radii of outer and inner circle are 4 cm and 3 cm. Area of the ring is ___________ sq.cm.
A. 21
B. 44
C. 12
D. 22
Answer:D
The radii of outer and inner circle are 4 cm and 3 cm. Area of the ring is ___________ sq.cm.
A. 21 B. 44 C. 12 D. 22