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AnnyKZ [126]
3 years ago
8

Pls explain the easiest way you an this will help me Thanks XD

Mathematics
1 answer:
Ostrovityanka [42]3 years ago
7 0
The ratio is 4:3:1
let the ratio be 4x:3x:x
according to the question,4x+3x+x=40
8x=40
x=5
therefore amount of gravel=x*4=5*4=20m^{3}
amount of sand=5*3=15m^{3}
amount of cement=5*1=5m^{3}
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The formula for the circumference C of a circle with radius r is C = 2πr. Which of the following is a formula for π (pi) of the
ANTONII [103]
The best and most correct answer among the choices provided by your question is none of the above.
<span>
The formula for π (pi) of the circle in terms of the circumference and radius is: Pi = C/2r.</span>


I hope my answer has come to your help. Thank you for posting your question here in Brainly. We hope to answer more of your questions and inquiries soon. Have a nice day ahead!
3 0
3 years ago
Read 2 more answers
Aubrey is making cone-shaped hats for a birthday party. She mistakenly thinks that she will need about 104 square inches of pape
Mashutka [201]

Answer:

Option C. is the correct option.

Step-by-step explanation:

Given question is incomplete; here is the complete question.

Aubrey is making cone-shaped hats for a birthday party. She mistakenly thinks that she will need about 104 square inches of paper for each hat.

Cone with diameter six inches and slant height eight inches.

What is the correct amount of paper Aubrey will need per hat? Explain Aubrey’s mistake. Use 3.14 for π and round to the nearest inch.

A.  About 70 in2; Aubrey found the surface area of the cone, but did not include the base.

B.  About 70 in2; Aubrey used the diameter instead of the radius to find the surface area of a cone.

C.  About 75 in2; Aubrey found the surface area of the cone and included the base.

D.  About 75 in2; Aubrey found the volume of the cone instead of the surface area.

Lateral surface area of a cone = Paper required to for each hat

Lateral surface area = πrl

Here r = radius of the cone

l = lateral height of the cone

Lateral surface area = π(3)(8)

                                 = 75.36 square inches

                                 ≈ 75 square inches

Therefore, total paper required for each cap is about 75 square inches.

Total surface area of the cone (Lateral area + Area of the base)

= πr(r + l)

= 3.14(3)(3 + 8)

= 103.62

≈ 104 square inches.

Aubrey did a mistake by finding the total surface area (including base area) of the cone instead of lateral surface area.

Therefore, option C. is the correct option.

7 0
3 years ago
Write an expression so that when u divided 1/4 by a number the answer will be larger
Viktor [21]
20x1/4=5
Think thats what you mean
4 0
3 years ago
a cone has a radius of 1.2 inches and a height of 2.9 inches. What is the volume, to the nearest tenth of cubic inch, of the con
natita [175]
12.9986 would be the answer from a calculator but I'd say it's 12.9. Hope this helped!
8 0
3 years ago
Four frogs jumped a total of 185 centimeters how far did each frog jump
Svet_ta [14]
The answer is 46.25cm
5 0
3 years ago
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