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ExtremeBDS [4]
3 years ago
15

In the diagram, the radius of the outer circle is

Mathematics
2 answers:
Anettt [7]3 years ago
6 0
Subtract the area of the inner circle (2pi*6^2) which is approximately 226.08 cm^2. So add this to the area of the shaded region to get 3873.08 cm^2. Substitute 2x in for r, the resulting equation is 3873.08 cm^2 = 2*pi*(2x)^2 or 8*pi*x^2. Divide both sides by 8pi. Results in 154.18 = x^2, so x is approximately 12.3-12.4.
Hitman42 [59]3 years ago
5 0

where is the shaded region?

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Answer:

The correct answer is 10 days.

Step-by-step explanation:

To fill a trench, 5 men work for 6 hours a day for eight days.

Total work hours required is given by 5 × 6 × 8 = 240 hours.

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Let these three men need to work for x days.

Therefore total work hour these group of three men gave = 3 × 8 × x = 24x hours

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