What is the total surface area of a right circular cone of height 14 cm and base radius 7 cm?

h = 14 cm, r = 7 cm.  

So, l = $72+142 = 245 = 75cm$   

Total surface area = $\mathrm{\pi rl}+\mathrm{\pi r}2$ = $\frac{22}{7}\times 7\times 75 + \frac{22}{7}\times 7\times 7$ 

= $1545+1$ 

= (3.236 x 154) sq.cm   

= 498.35 sq.cm