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Vinil7 [7]
4 years ago
9

Find the volume of a right circular cone that has a height of 9 m and a base with a circumference of 19.6 m. Round your answer t

o the nearest tenth of a cubic meter.
Mathematics
2 answers:
Blizzard [7]4 years ago
6 0

Answer:

V = 91.70 cubic meters

Step-by-step explanation:

The volume of a right circular cone

V = πr^2h/3

V - volume of the cone

π - pie

r - radius of the cone

h - height of the cone

Given

h - 9m

Circumference = 19.6m

Find radius

Circumference = 2πr

r = c/2π

c - 19.6

π - 3.142

r = 19.6/ 2*3.142

= 19.6/6.284

= 3.119m

Using the volume of a right circular cone

V = πr2h/3

V = 3.142 * 3.119^2 * 9/3

= 3.142 * 9.728 * 3

= 91.6976 cubic meter

Rounding to the nearest tenth cubic meter

V = 91.70 cubic meters

den301095 [7]4 years ago
4 0

Answer:

91.7 m³

Step-by-step explanation:

V = 1/3 πr²h

2πr = 19.6

r = 19.6 / (2 x 3.14) = 3.12

V = 1/3 x 3.14 x 3.12² x 9 = 91.7

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matrenka [14]

Answer:

2)  -5/7

Step-by-step explanation:

\frac{-7n}{10} = \frac{1}{2}

cross-multiply to get:

10 = -14n

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3 0
3 years ago
Help on this plzzz real quick
BlackZzzverrR [31]
8 and 15 are the lengths of the legs.
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In general, tan x = opp/adj
You have 8/15, so here 8 is the opposite leg and 15 is the adjacent leg.
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6 0
3 years ago
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Please help it would be so much appreciated!!
zavuch27 [327]

Answer:

C

Step-by-step explanation:

there is the ground line of about -5.5 to +5.5 = 11 ft.

then the 2 walls of 7 ft height = 14 ft.

that is already 25 ft.

the 2 roof sides are both a little bit longer than the corresponding ground line of 5.5ft.

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in actual numbers a roof side is (using Pythagoras) :

roof side² = 2.5² + 5.5² = 6.25 + 30.25 = 36.5

roof side = 6.041522987... ft

so, the actual perimeter is

25 + 2×6.041522987... = 37.08304597... ft

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