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azamat
2 years ago
9

2. The diagram shows some steps. Find the volume in cm^3 and surface area in cm^2.

Mathematics
2 answers:
aleksley [76]2 years ago
6 0

Step-by-step explanation:

Volume= [(20+20) x (20+20) x 100] - (20 x 20 x 100)

=120000cm^3

surface area= 2 x 40 x 100 + 2 x (40 x 40 - 20 x 20) + 4 x 20 x 100

=18400cm^2

hoa [83]2 years ago
6 0

Volume:

There are a total of 3 "blocks". Each block:

lwh=20cm*20cm*1m=20*20*100=4000cm³ per block

so 3 blocks = 4000cm³*3=12000cm³

Surface Area:

There are 4 |__| faces. Each = 20cm*1m = 20cm*100cm = 2000cm²

2000cm²*4=8000cm² for part 1

There are 2 L faces. Each L face is (20+20)*20=800cm²

so 2 L faces = 1600cm²

There is the back and the bottom are equal. Each is 100*(20+20)=4000cm²

Total Surface Area: 2000+800+4000 (cm²) = 6800cm²

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anygoal [31]

Answer:

Solution of the given expression is 26

Solution of the given expression is 8.67

Step-by-step explanation:

Given:

a] 4\frac{1}{3} \times 6

b] 2\frac{3}{5} \times 3\frac{1}{3}

Find the solution;

Computation:

a] 4\frac{1}{3} \times 6

Step 1 ;

Changed mixed fraction into simple fraction

⇒ 13/3 x 6

Step 2 ;

⇒ 13 x 2

26

Solution of the given expression is 26

b] 2\frac{3}{5} \times 3\frac{1}{3}

Step 1 ;

Changed mixed fraction into simple fraction

⇒ (13/5) x (10/3)

Step 2 ;

⇒ 130 / 15

8.67

Solution of the given expression is 8.67

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3 years ago
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You and some friends have $30. You want to order large pizzas (p) that are $9 each and drinks
DochEvi [55]
Given:
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cost of pizza = $9
cost of drinks = $1
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pizza and drinks should only be equal to or less than the budget of $30.

$9p + $1d <u>< </u>$30

unit cost of pizza :          9 
unit cost of drinks :         1
total cost of set (p & d) 10

pizza = 9/10 x 30 = 27 total cost of pizza
drinks =1/10 x 30 =   3 total cost of drinks

27 ÷ 9 = 3 number of pizzas to order 
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To check:

9p + 1d <u>< </u>30
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3 years ago
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Amy and Zach each have 24 feet of fencing for their rectangular gardens. Amy makes her fence 6 feet long . Zach makes his fence
saul85 [17]

For this case we have that by definition, the area of a rectangle is given by:

A = w * l

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l: is the length of the rectangle

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Amy:

l = 6 \ ft\\2w + 2 (l) = 24\\2w + 2 (6) = 24\\2w + 12 = 24\\2w = 24-12\\2w = 12\\w = 6

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Zach:

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Answer:

Amy's garden has a greater area

36 \ ft ^ 2-32 \ ft ^ 2 = 4ft ^ 2, is 4 \ ft ^ 2greater

5 0
3 years ago
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