Answer:
Option C
Step-by-step explanation:
Complete question is
Each lower section is a total of two inches wider than the section above it. If the yellow top of the upper section has an area of 12.56 square inches, what is the approximate area of the green visible portion of the bottom section which he will need to cover with icing?
A. 13 square inches
B. 88 square inches
C. 49 square inches
D. 22 square inches
Solution -
Given
Top of each cylindrical section is covered with a different color icing
Radius of each color icing is two inches less than the section below it.
Let the radius of the icing be "r"
Then the surface area of the icing will be
Now area of the yellow icing is equal to square inches
Thus,
On solving the above equation for r, we get -
r = 2 inches
Now radius of the section below the icing is equal to
inches
Area of the section below the icing
Thus, option C is correct
