Question

Calculate TSA of cone whose radius is 3.5 cm and height =5cm

Answer 1

Answer:

r = 3.5 cm

h = 5 cm

l = √$h^{2} + r^{2}$

=√$(3.5)^{2} + 5^{2}$

= √12.25 + 25

=√37.25

=6.1032.....

≈6cm

tsa = π r (r + l)

     = 22/7 x 3.5 ( 3.5 + 6)

    = 22 x 0.5 x 9.5

    = 104.5$cm^{2}$

hope this helps you