All categories

4 years ago

Find the total surface area of this cone.

Mathematics

1 answer:

denpristay [2]4 years ago

6 0

Answer:

200π cm^2

Step-by-step explanation:

Sb = 8^2 π = 64π cm^2

a = sqrt2 [8^2 + 15^2] = sqrt2 [64 + 225] = sqrt (289) = 17 cm

Sl = 8x17xπ = 136 π cm^2

SA = 136π + 64π =200π cm^2

You might be interested in

Choose the correct sign that compares the decimal numbers. 0.737__0.708

allochka39001 [22]

Answer:

Step-by-step explanation:

0.737 is greater than 0.708

4 0

3 years ago

Read 2 more answers

Help, I don’t understand

Sedbober [7]

Answer:

A=90°,B=90°,C=90°,D=90°

Step-by-step explanation:

all of the numbers A-D add up to 360°

6 0

3 years ago

A large storage tank, open to the atmosphere at the top and filled with water, develops a small hole in its side at a point 10.4

vlabodo [156]

Answer:

Therefore the diameter of the hole is $1.94 \times 10^{-3}$ m.

Step-by-step explanation:

Bernoulli's equation,

$P_1+\frac12 \rho v^2_1+\rho g h_1= P_2+\frac12 \rho v^2_2+\rho g h_2$

P₁ = P₂= atmospheric presser

$\rho$ = density

$\frac12 \rho v^2_1+\rho g h_1= \frac12 \rho v^2_2+\rho g h_2$ [since P₁ = P₂]

$\Rightarrow\rho (\frac12 v^2_1+ g h_1)= \rho(\frac12 v^2_2+ g h_2)$

$\Rightarrow\frac12 v^2_1+ g h_1= \frac12 v^2_2+ g h_2$

$\Rightarrow\frac12 v^2_2-\frac12 v^2_1=g h_1- g h_2$

$\Rightarrow v^2_2- v^2_1=2g h$ [ $h_1-h_2=h$ ]

Here $v_1\approx 0$

$\Rightarrow v^2_2=2g h$

$\therefore v_2=\sqrt {2gh$

Here g= 9.8 m/s² , h = 10.4 m

The velocity of water that leaves from the hole $v_2$ = $\sqrt {2\times 9.8\times 10.4}$ m/s

=14.28 m/s.

Given, the rate of flow from the leak is $2.53\times 10^{-3}$ $m^3/min$

$=\frac{2.53\times 10^{-3}}{60}$ $m^3/s$

Let the diameter of the hole be d.

Then the cross section area of the hole is $=\pi (\frac d2)^2$

We know that,

The rate of flow = Cross section area × speed

$\Rightarrow \frac{2.53\times 10^{-3}}{60} =\pi (\frac d2)^2\times 14.28$

$\Rightarrow (\frac d2)^2=\frac{2.53\times 10^{-3}}{60\times 14.28\times \pi}$

$\Rightarrow d= 1.94 \times 10^{-3}$

Therefore the diameter of the hole is $1.94 \times 10^{-3}$ m.

4 0

4 years ago

There were 409 students in school. After some of them graduated, there were 172 students left. How many students graduated ?

nataly862011 [7]

Answer:

237 students graduated

Step-by-step explanation:

Subtract 172 from 409, obtaining 237.

237 students graduated

6 0

3 years ago

Read 2 more answers

Please help I will give brainliest.

aleksley [76]

A polygon that has both reflectional and rotational symmetry includes:

B. Square
C. Triangle
E. Equilateral Triangle.

<h3>What is a polygon?</h3>

A polygon is a closed curve made up of a set of line segments (sides) connected in such a way that no two segments cross.

Examples of polygons are triangles (three sides), quadrilaterals (four sides), and pentagons (five sides).

Triangle, square, and other quadrilaterals have both line symmetry and rotational symmetry.

Thus, a polygon that has both reflectional and rotational symmetry includes Options B, C, and E.

Learn more about polygons and reflectional and rotational symmetry at brainly.com/question/1592456 and brainly.com/question/18633533

#SPJ1

4 0

2 years ago