An engineer is planning a new water pipe installation. The circular pipe

An engineer is planning a new water pipe installation. The circular pipe has a diameter of d=20\text{ cm}d=20 cmd, equals, 20, space, c, m. What is the area AAA of the circular cross section of this pipe?

2 months ago

Solution 1

Guest Guest #4212
2 months ago

Answer: The answer is 314.28 cm² (approx.).

Step-by-step explanation:  Given that an engineer is going to install a new water pipe. The diameter of this circular pipe is, d = 20 cm.

We need to find the area 'A' of the circular cross-section of the pipe.

Given, diameter of the circular section is


So, the radius of the circular cross-section will be


Therefore, cross-sectional area of the pipe is

\textup{A}=\pi \textup{r}^2=\dfrac{22}{7}(10)^2=\dfrac{2200}{7}=314\dfrac{2}{7}=314.28~.~.~.~\textup{cm}^2.

Thus, the answer is 314.28 cm² (approx.).

Solution 2

Guest Guest #4213
2 months ago



Step-by-step explanation:

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Step-by-step explanation:

Jeremy, Sue, and Holly are siblings. Sue was born three years before Holly, and Jeremy was born five years before Sue. The product of Sue's age and Jeremy's age is at most 150. If x represents the age of Holly, which inequality can be used to find the age of each sibling?
Solution 1


Inequality to find the age of siblings is x²+ 11x + 24 ≤ 150.

Step-by-step explanation:

Let the age of Holly is x years. Now from the statements of the question we will form the equations.

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Now statement says the product of Sue's age and Jeremy's age is at most 150.

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x² + 11x + 24 ≤ 150

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Solution 2

Answer: x^2+11x+24 </= 150