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vesna_86 [32]
3 years ago
12

7. What's the perimeter of a rectangle with length 12 m and width 5 m?

Mathematics
2 answers:
azamat3 years ago
8 0

Answer:

Option(c) 34m

Step-by-step explanation:

Perimeter of a rectangle = 2(length + breadth)

length = 12m

breadth/width = 5m

Perimeter = 2(12 + 5)

                = 2(17)

                = 34m

BigorU [14]3 years ago
5 0

Answer:

34

you just add, 12+5+12+5 to get 34

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Half a number increased by 10 is 12. Find the number.​
Lady_Fox [76]

Answer:

4

Step-by-step explanation:

Equation:

1/2x + 10 = 12

Subtract 10 from both sides:

1/2x = 2

Divide by 1/2 from both sides:

x = 4

-Chetan K

3 0
3 years ago
Answers? & provide how u did it if u can thank u.
sp2606 [1]

Answer:

8

Step-by-step explanation:

a² = 10² - 6²

a² = 100 - 36

a² = 64

a = √64

a = <u>8</u>

So, the value of a is 8

<em>Hope </em><em>this </em><em>is </em><em>helpful </em><em>and </em><em>useful </em><em>:</em><em>)</em>

7 0
3 years ago
Read 2 more answers
Find the surface area and volume of cone. A = rs + r2 V = 1/3r2 h A cone's slant height (s) is 15 cm and its radius is 8 cm. Sur
Setler [38]

Answer:

<h2>a) 483.6cm²</h2><h2>b) 850.1 cm³</h2>

Step-by-step explanation:

Given the slant height 's' and its radius 'r' to be 15cm and 8cm respectively.

the total surface of the cone A = πrs+πr² and the volume is expressed as

V = 1/3πr²h

For the surface area of the cone;

Given parameters

radius = 8 cm and slant height s = 15 cm

Total surface area A = π(8)(15) + π(8)²

A = 90π+64π

A = 154π

If π = 3.14

A = 154(3.14)

A = 483.56cm²

A = 483.6cm²

Hence the total surface area of the cone to the nearest tenth is 483.6cm²

For the volume of the cone;

V = 1/3πr²h

Using pythagoras theorem to get the height of the cone;

l² = h²+r²

h² = l²-r²

h² = 15²-8²

h² = 225-64

h² = 161

h = √161

h = 12.69cm

V = 1/3π* (8)² * 12.69

V =  1/3π* 64 * 12.69

V =  1/3*3.14* 64 * 12.69

V = 2550.1824/3

V = 850.06 cm³

V = 850.1 cm³

Hence, the volume of the cone is  850.1 cm³ to the nearest tenth.

7 0
3 years ago
Help me with a question
ahrayia [7]

Answer: yea

Step-by-step explanation:

4 0
3 years ago
What is the Area of 10cm &amp; 15cm?
VashaNatasha [74]

Answer:

150cm

Step-by-step explanation:

The area is base times height 10 times 15 which is 150 cm

6 0
3 years ago
Read 2 more answers
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