Question

(iii) What is the TSA of cone:
(a) 804 cm?
(b) 704 cm?
(c) 604 cm?
(d) 504 cm?​

Answer 1

[B]Total surface area of cone=πr  

2

+πrl (r=Radius, l=slant height)

⇒704=πr(l+r)

⇒704=  

7

22

​  

×7(7+x)

⇒  

22

704

​  

−7=l

⇒l=25cm.