The height and radius of a cone are 3 cm and 4 cm respectively. Its curved surface area must be is
A. 62x 6/7 sq cm
B. 57x 3/4 sq cm
C. 6 cm2
D. 12 cm2
Answer:A
The height and radius of a cone are 3 cm and 4 cm respectively. Its curved surface area must be is
A. 62x 6/7 sq cm B. 57x 3/4 sq cm C. 6 cm2 D. 12 cm2