AREA
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Solve this problem using in your mind. Write your answers on a Observations Paper.
- Mrs. Sol Vea was challenged to make a two-layered cake with the diameter of 16 inches and 14 Inches. What is the area of the 1st layer of the cake? How about the whole cake
1st Layer:
»» Let's us find the area of the 1st layer.
- The diameter is 16, divide 16 by 2 to get the radius ( 16 ÷ 2 = 8 )
- Solve the area using the formula
¶ r²
A = ¶ r²
A = (3.14) (8)²
A = (3.14) (64)
= 200.96
2nd Layer:
»» Now, let's solve the area of the 2nd layer and add it to the area of the 1st layer to get the area of the whole cake.
- The diameter is 14, divide 14 by 2 to get the radius ( 14 ÷ 2 = 7 )
- Solve the area using the formula
¶ r²
A = ¶ r²
A = (3.14) (7)²
A = (3.14) (49)
= 153.86
Whole Cake:
Add 153.86 to 200.96
Final Answer:
= 354.82
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