Question

Please explain in detail how to solve each one of them plz.

Answer 1

a) make as triangle.,

using Pythagorean theorem.,

b) b coz cone base forms the circle in 2d., so that arc of the AB is equal to the circle's circumstances.,

c) circumstances of circle is 2πr.,

r=(AB/2π).

d) area base of cone = area of the circle (πr^2).,

e) eqn for curved surface of the cone is πrl.,

f) eqn for total surface area of the cone is πr(l+r).

thank u.,

hope it's helpful