Question

The lateral area of a cone is 86 cm squared. The radius is 18 cm. Find the slant height to

the nearest tenth.

Answer 1

1.5 cm

Explanation:

The lateral area is given by ...

LA = πrh

86 cm^2 = π(18 cm)h

h = (86 cm^2)/(18π cm) ≈ 1.5 . . . cm

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Comment on the problem

The geometry described here is impossible. The slant height cannot be less than the radius of the cone. We suspect a typo in the problem statement.