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Mathematics

1 answer:

insens350 [35]4 years ago

7 0

Answer:

8/20 + 5/20 = 13/20

Step-by-step explanation: You would have to multiply the numerator and denominator of 2/5 by 4 to get 8/20 and multiply the numerator and denominator of 1/4 by 5 to get 5/20, equaling to 13/20.

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if the hieght and radius of the cone is tripled then find the ratio of Volume of the new cone and of that of original

solniwko [45]

$\bf \textit{volume of a cone}\\\\
V=\cfrac{\pi r^2 h}{3}\quad 
\begin{cases}
r=radius\\
h=height\\
-----\\
r=\stackrel{3\times r}{3r}\\
h=\stackrel{3\times h}{3h}
\end{cases}\implies V=\cfrac{\pi (3r)^2(3h)}{3}
\\\\\\
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Step-by-step explanation:

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