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3 years ago

Help pls so people say it’s none of these but idk I am confused.

Mathematics

2 answers:

crimeas [40]3 years ago

8 0

Answer:

Volume = $\pi r^2 h$

2512 = 3.14 × r^2 × 8

$r^2 = \displaystyle\frac{314}{3.14}$

$r^2 = 100$

$r = 10 \ cm$

$Diameter = 2r = 20 \ cm$

Dont get confused try to understand : )

anzhelika [568]3 years ago

6 0

Answer:

20 cm

Step-by-step explanation:

The volume of a cylinder is given by

V = pi r^2 h

We are given the volume and the height

2512 = pi r^2 *8

Divide each side by 8

2512/8 = pi r^2 *8/8

314 = pi r^2

Divide each side by pi

314/3.14 = 3.14 r^2 /3.14

100 = r^2

Take the square root of each side

sqrt(100) = sqrt(r^2)

10 = r

We want to find the diameter

d =2r

d =2(10)

d =20

The diameter is 20 cm

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