Question

Konery wants to make their waffle cones with a height of 6 in. Their current net design has a diameter of 2.5 in. and a slant height of 6.25 in. Will this work for the desired height? Round the answer to the nearest tenth.
A. No, the height is too long by 0.1 in.
B. No, the height is too long by 0.7 in.
C. No, the height is too long by 0.4 in.
D. No the height is too short by 0.3 in.

Answer 1

Radius = 2.5/2 = 1.25 in. Height = sqrt(6.25^2 − 1.25^2) = sqrt(39.0625 − 1.5625) = sqrt(37.5) ≈ 6.1 in.
That's 0.1 in longer than 6 in → A.