Question 1 of 3 4x7 · 8x3 is equivalent to:

12x4

12x10

12x21

32x10

32x21

Solved

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Ответ:

thegoat3180

05.03.2021

Mathematics

30295 mm^3

Step-by-step explanation:

V of pencil = V of cone + V of cylinder

let's find V of cone first (you can do cylinder first but I'm getting the hard stuff out first)

V cone = $\frac{1}{3} \pi r^{2} h$

now plug known values in

$\frac{1}{3}(36)(9)(3.14) =339.12 \\$ $mm^{3}$

now cylinder

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

plugging known values

= (3.14)(6^2)(64) = (3.14)(36)(64) = 7234.56 mm^3

add the two values together to find the volume of the crayon

339.12 + 7234.56= 7573. 68 mm^3

rounding to nearest millimeter: 7574 mm^3

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Question 1 of 3 4x7 · 8x3 is equivalent to: 12x4 12x10 12x21 32x10 32x21