Question

1) area of the base of a cone is 1386sq.Cm and its height is 28cm.

Answer 1

CONE:-

height = h = 28cm

radius = r = ?

Area of base = πr²

            1386 = 22/7 × r²

       1386 × 7 = r²

      -------------

             22

    9702 ÷ 22 = r²

               441   = r²

                   ∴r = √441

∴The radius of the cone is 20.04cm.

     

Answer 2

The answer is 20.04.