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lara31 [8.8K]
3 years ago
5

Work out the volume of a cuboid 2cm by 4cm by 5cm

Mathematics
2 answers:
mash [69]3 years ago
4 0
A volume of a cube = l × w × h = v
So 2 × 4 × 5 = 40 cm³
andrew-mc [135]3 years ago
3 0
For a cuboid's volume you simply go length x width x heigth so 2x4x5 so it's 40.
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A 3-D object made of 2 cm × 2 cm × 2 cm cubes is dipped in paint. . If the painted object is separated into individual cubes, th
joja [24]

Answer:

The answer is "48 \ cm^2"

Step-by-step explanation:

Area of every face:

A=bh\\\\

   =2\times 2\\\\=4 \ cm^2\\

count overlaps and times by 2:

So,

\to  6 \times 2= 12

There are 12 unpainted faces each face is 4 \ cm^2\\\\

\to 12 \times 4 \ cm^2\\\\\to 48 \ cm^2

5 0
3 years ago
A $4,000.00 principal earns 5% interest, compounded annually. After 4 years, what is the balance in the account?
denis23 [38]
First question:
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Second question:
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Third question:
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6 0
3 years ago
Find the value of x <br> (8x-1) (4x+7)
Helen [10]

Answer:

The value of x = 7

Step-by-step explanation:

Given the right triangle

  • Right angle = 90°
  • α = (4x+7)°
  • β =  (8x-1)°

  • We know that the sum of angles of a triangle is 180°.

so

Right angle + α + β =  180°

90° + 4x+7 + 8x-1 = 180

Group like terms

4x+8x+90+7-1=180

Add similar elements: :4x+8x=12x

12x+90+7-1=180

12x+96=180

12x=84

Divide both sides by 12

\frac{12x}{12}=\frac{84}{12}

x = 7

Therefore, the value of x = 7

7 0
3 years ago
A worker at a cabinet shop is cutting out pieces of wood for a dresser. He needs pieces that are 4 1/4inches long. Each saw cut
ella [17]

Answer: he will be able to make 19 full pieces

Step-by-step explanation:

1. Start off by making 7 feet into 84 inches so the measurements can match.

2. Add 4/14 inches and the 1/8 a inch together so you know how much is being taken off 84 inches. The amount will be 35/8 inches.

3. Divide 84 inches by 35/8 inches = 19 1/5

4. The whole number of the answer will be how many boards you can make from the board.

8 0
2 years ago
Ella’s Cafe uses 3/10 of a bag of coffee every day. For how many days will 2 7/10 bags of coffee last? Simplify your answer and
Vilka [71]
It should last for 9 days.


7 0
3 years ago
Read 2 more answers
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