A cube whose edge is 20 cm long has circleon each of its face painted black. what is the total area of unpainted surface of the cube if the cicles are of largest possible area ? A) 9571 B) 257.14 C) 514.28 D) 331.33 All in Cm^2
Answers
Answered by
33
Given:
Cube has 6 faces.
Area of a cube = (20cm)²
Area of a cube = 400 cm²
Area of a circle = π r²
Area of a circle = 3.14 * (10cm)²
Area of a circle = 3.14 * 100cm²
Area of a circle = 314 cm²
400 cm² - 314 cm² = 86 cm²
86 cm² x 6 faces = 516 cm²
The closest to my answer is C.) 514.28
The difference would be because of the rounding off of decimal places.
Cube has 6 faces.
Area of a cube = (20cm)²
Area of a cube = 400 cm²
Area of a circle = π r²
Area of a circle = 3.14 * (10cm)²
Area of a circle = 3.14 * 100cm²
Area of a circle = 314 cm²
400 cm² - 314 cm² = 86 cm²
86 cm² x 6 faces = 516 cm²
The closest to my answer is C.) 514.28
The difference would be because of the rounding off of decimal places.
Answered by
1
Answer:
option c) 514.28 cm²
Step-by-step explanation:
because it is the closest number of 516 cm ²
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