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3 years ago

Find the surface area of the composite solid.

Mathematics

1 answer:

erastovalidia [21]3 years ago

3 0

Answer:the correct answer is D.

Step-by-step explanation:it showed me the answer.

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The diameter of a iron sphere is 8 cm. It is beaten and drawn into a wire with a diameter of 2 mm. Find the length of the wire.

djyliett [7]

Answer : The length of the wire is, 8533 cm

Step-by-step explanation :

As the iron sphere is beaten and drawn into a wire. That means, their volume will be equal.

Volume of iron sphere = Volume of cylindrical wire

The formula will be:

$\frac{4}{3}\pi r_1^3=\pi r_2^2h$

where,

$r_1$ = radius of sphere = $\frac{Diamtere}{2}=\frac{8cm}{2}=4cm$

$r_2$ = radius of cylindrical wire = $\frac{Diamtere}{2}=\frac{2mm}{2}=1mm=0.1cm$

h = height of cylindrical wire or length of wire

Now put all the given values in the above formula, we get:

$\frac{4}{3}\pi r_1^3=\pi r_2^2h$

$\frac{4}{3}\times r_1^3=r_2^2h$

$\frac{4}{3}\times (4)^3=(0.1)^2h$

$h=8533.33cm\approx 8533cm$

Therefore, the length of the wire is, 8533 cm

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3 years ago

What’s the answer to this math problem

nydimaria [60]

Answer:$240.00

Step-by-step explanation:

$240.00

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An artist pours 60 gallons of paint equally into 8 containers how much paint is in each container?

uranmaximum [27]

Answer:

7.5

Step-by-step explanation:

cause you can divide the 60 with the 8

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Please help 15 points<br> x2≥−4

Nutka1998 [239]

Answer:

Solve for

by simplifying both sides of the inequality, then isolating the variable.

Step-by-step explanation:

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3 years ago

Delia spent 45 minutes working on her book report. She finished the report at 6:10 p.m. at what time did Delia start working on

inna [77]

All you have to do is subtract 45 from 6:10. Which is 5:65pm she started

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