3 years ago

I need help..

Mathematics

1 answer:

Rus_ich [418]3 years ago

6 0

Answer:

A = 2, B = 1, C = 5, D = 3, E = 4

Step-by-step explanation:

Variety of workings including

Opposite angles are equal

90 degrees on a right angle

180 degrees in a straight line

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What is the height of the cone below?<br> - 3<br> - 9<br> - 27<br> - 75

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$\bf \textit{volume of a cone}\\\\ V=\cfrac{\pi r^2 h}{3}~~ \begin{cases} r=radius\\ h=height\\ \end{cases}\implies V=\pi r^2\cdot \cfrac{h}{3}~~ \begin{cases} \pi r^2=&area~of\\ &circular\\ &base\\ \cline{1-2} \stackrel{B}{\pi r^2}=&5\\ V=&45 \end{cases} \\\\\\ 45=5\cdot \cfrac{h}{3}\implies 135=5h\implies \cfrac{135}{5}=h\implies 27=h$