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Sever21 [200]
3 years ago
10

A cylindrical container closed of both end has a radius of 7cm and height of 6cm A.)find the total surface area of the container

B.) find the volume of the container
Mathematics
1 answer:
emmasim [6.3K]3 years ago
8 0

Answer:

Step-by-step explanation:

Surface:

surface area = 2 ends + side

The ends are both a circle and they are identical.

area of a circle = \pir^{2}

then  \pi7^{2} = 153.93804 cm^{2}

since there are two ends multiply the above by 2

2*153.93804 =307.87608 cm^{2}

the side is the length * height

length = perimeter of the circle , the perimeter of a circle is also the circumference.   circ = 2\pir

circ = 2*\pi*7 = 53.407075

surface area of the side = 6* 53.407075=320.44245

add the two surfaces areas together :)

total surface area = 320.44245 + 307.87608 = 628.3185307 cm^{2}

Volume:

volume is the area of the end times the height

volume = circle area * height

volume = 153.93804 * 6

volume = 923.62824 cm^{3}

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Step-by-step explanation:

Step one:

given data

He bought a video game system for $299

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Step-by-step explanation:

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After each charging, a battery is able to hold only 97% of the charge from the previous charging. The battery was used for 18 ho
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Answer:

The total nuber of hours that the battery can be used over its lifetime is 600.

Step-by-step explanation:

We use an infinite geometric series to solve this question.

The sum of all values of an infinite geometric series is given by the following equation:

S = \frac{a_{1}}{1 - r}

In which a_{1} is the first term and r is the common ratio.

After each charging, a battery is able to hold only 97% of the charge from the previous charging.

This means that r = 0.97

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The total nuber of hours that the battery can be used over its lifetime is 600.

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