Question

the total surface area of a cone of radius 6cm and slantheight is 8cm 2 अंक 264 246 244 260​

Answer 1

Answer:

Correct option is A)

We have,

r=6cm and h=8cm.

∴l=

r

2

+h

2

⇒l=

36+64

=10cm.

∴ Total surface area=πr

2

+πrl=πr(r+l)

=

7

22

×6×(10+6)

=

7

22

×6×16cm

2

=301.71cm

2

.