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2 years ago

A cylinder has a base radius of 10in and a height of 20in. What is its volume in cubic in, to the nearest tenths place?

Mathematics

2 answers:

irina1246 [14]2 years ago

5 0

Answer:

6283.2

Step-by-step explanation:

$V=\pi r^{2} h$

= $=\pi *10^{2} *20$

=6283.18531

=6283.2(correct to the tenths place)

zhenek [66]2 years ago

3 0

Answer:

6,283.2 in^3

Step-by-step explanation:

The volume formula for a cylinder is V = (pi)r^2*h

and in this case r = 10 in, h = 20 in

so the volume of this cylinder is

V = 3.14159(10 in)^2*(20 in) = 6,283.2 in^3

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Step-by-step explanation:

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3 years ago

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Which of the following lines is perpendicular to the line y=7/8x-2?

LenKa [72]

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2 years ago

Please help!

coldgirl [10]

Answer:

Question 1 )

given ,

height of cylinder = 9 cm

diameter of cylinder = 10 cm

$\dashrightarrow \: radius = \frac{10}{5} \: cm \\$

now ,

$Volume \: of \: cylinder = \pi \: r {}^{2} h \\ \\ substitutng \: the \: values \: of \: h \: and \: r \: \\ \\ \dashrightarrow \: \pi \: \times (\frac{10}{2} ) {}^{2} \times 9 \\ \\ \dashrightarrow \: \pi \: \times 25 \times 9 \\ \\ \dashrightarrow \: 225\pi \: cm {}^{3}$

therefore ,

option (C) is correct.

______________________________________

Question - 2 )

dimensions of the rectangular prism are 2 × 3 × 4

$Lateral \: surface \: area = 2h(l + b) \\ \\ \dashrightarrow \: 2 \times 3(4 + 2) \\ \\ \dashrightarrow \: 6(6) \\ \\ \dashrightarrow \: 36 \: cm {}^{2}$