Question

find surface area of a cone in terms of its radius when height is equal to radius

Answer 1

Answer:

HOPE THIS BRING A SMILE IN YOUR FACE

Step-by-step explanation:

r=h

l^2=r^2+h^2

l^2=r^2+r^2

l^2=2r^2

l=√2r^2

l=r√2

Surface area of cone = 22/7×r(l+r)

=22/7×r(r√2+r)

=22/7×r×r(√2+1)

=22/7×r^2(√2+1)