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3 years ago

Find the total surface area of a cylinder with a height of 7 cm and radius of 3 cm. Leave your answer in terms of π.

Mathematics

2 answers:

svlad2 [7]3 years ago

4 0

Answer: =60π cm2

Step-by-step explanation:

Total surface area of a cylinder is calculated by 2πrh+2πr2, where π is a constant, h is the height= 7cm and r is radius= 3cm

Slot the values into the formula:

2π(3 × 7 ) + 2π (3)^2

2 π 21 + 2π9.....multiply 2 by 21, and 2 by 9

42π + 18π

=60π cm2

I hope this helps.

bogdanovich [222]3 years ago

3 0

Answer:

Option C.60π cm2 is the correct answer for this .

Step-by-step explanation:

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The world's tallest building is the Burj Khalifa in Dubai at 828 m tall. The CN Tower in Toronto is 553 m tall. Ryan wants to co

Taya2010 [7]

Answer:

Volume of Burj Khalifa Prism = 4000 $cm^2$

Volume of CN Tower Prism = 2671 $cm^2$

Step-by-step explanation:

Given

Height of Burj Khalifa = 828 m

Height of CN Tower in Toronto = 553 m

Base of rectangular prism is a square with sides 10 cm $\times$ 10 cm.

Height of Burj Khalifa prism = 40 cm

828 m is represented as 40 cm

$\Rightarrow 553 m$ is represented as $\frac{40}{828 } \times 553 = 26.71\ cm$

So, height of rectangular prism of CN Tower = 26.71 cm

Volume of a Prism is given by the Formula:

$V=Area\ of\ Base \times Height$

Base is a square, so Area of base = $Side^2$

Volume of Burj Khalifa Prism:

$V_B=10^2 \times 40 = 4000\ cm^2$

Volume of CN Tower Prism:

$V_C=10^2 \times 26.71 = 2671\ cm^2$

So, the answer is:

Volume of Burj Khalifa Prism = 4000 $cm^2$

Volume of CN Tower Prism = 2671 $cm^2$

4 0

2 years ago

Classify the triangle based on the side lengths 9 40 41

vivado [14]

Answer:

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Step-by-step explanation:

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3 years ago

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docker41 [41]

Answer:

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Step-by-step explanation:

A) 4(3x + 2) - 2 = 12x + 8 -2 = 12x + 6

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3 0

3 years ago

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Temka [501]

Answer:

Step-by-step explanation:

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6 0

3 years ago

Suppose there are six people - J, M, R, S, T and W - who pass rumours among themselves. Each day J talks with M and W; M talks w

Triss [41]

Answer:

A) see attached

B) it takes 2 days, can be tell by w or s

C) Yes

Step-by-step explanation:

A) Image attached shows the situation, each arrow represents a talking between the 2 people.

B) As you can see, J has to tell M or W, that will take a day. Then, M or W have to tell S, that will take another day. In total it takes 2 days. As explanined, it can be tell by M or W.

C) Lets suppose that M and R stop talking to each other, this means they won't tell rumors. So, if the rumour begans with J, we would tell to W, one day, W will tell S, 2 days and S will tell T, 3 days. it would take 3 days to arrive to T.

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3 years ago