) If slant height of the cone is 21cm and the diameter of the base is 24 cm. The total surface area of a cone is:
A. 1200.77 sq.cm
B. 1177 sq.cm
C. 1222.77 sq.cm
D. 1244.57 sq.cm
Answer:D
) If slant height of the cone is 21cm and the diameter of the base is 24 cm. The total surface area of a cone is:
A. 1200.77 sq.cm B. 1177 sq.cm C. 1222.77 sq.cm D. 1244.57 sq.cm
Explanation: Total surface area = πr(l + r)