3 years ago

toothless car wash (the kid next door) can wash 3 cars in one and a half hours. how long will it take to wash 10 cars

Mathematics

1 answer:

katrin2010 [14]3 years ago

6 0

Answer:

5 hours

Step-by-step explanation:

1.5 (hours) / 3(cars) = 0.5 hours per car

0.5 x 10 = 5

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the lateral area of a cone is 574 pi cm2. The radius is 19.6 cm. What is the slant height to the nearest tenth of a centimeter?

bulgar [2K]

$\bf \textit{lateral area of a cone}\\\\
LA=\pi r\sqrt{r^2+h^2}~~
\begin{cases}
r=radius\\
\sqrt{r^2+h^2}=slant~height\\
-----------\\
LA=574\pi \\
r=19.6
\end{cases}
\\\\\\
574\pi =\pi (19.6)\sqrt{r^2+h^2}\implies \cfrac{574\pi }{19.6\pi }=\sqrt{r^2+h^2}
\\\\\\
\cfrac{574}{19.6}=\sqrt{r^2+h^2}$