Question

What is the approximate surface area of the larger cone?
Answer
817.8 square yards
467.5 square yards
267.1 square yards
152.7 square yards

Answer 1

this is the image

Answer 2

im assuming there are images of 2 cones, it is to suggest that they are similar. So by using similairity, the radius of the larger cone, is (21/12) *5=8.75

Given the formula for the surface area of a cone,

SA = pi* r ( r+l)
= pi * 8.75 (8.75+21)
=817.8 square yards

Answer 3

thank you