1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
ryzh [129]
3 years ago
7

A section of concrete pipe 30m long has an inside diameter of 1.2m and an outside diameter of 1.8m. what is the volume of concre

te in this section of pipe?
Mathematics
1 answer:
Fudgin [204]3 years ago
5 0

length of pipe= 30m

Inside dia. = 1.2m

Outside dia. = 1.8m


Volume of concrete= (outside dia. - inside dia.)h

V= (pi)
v= [(3.14*0.9*0.9)-(3.14*0.6*0.6)]30

v= (3.3534-1.1304)30
v=(2.233)30 = 66.690m cube

since it's volume the answer 66.690 is in cubic meters.

You might be interested in
Help on number 1 ? :)
LiRa [457]

Answer:

it would be the second opition

Step-by-step explanation:

6 0
3 years ago
Read 2 more answers
Add the two expressions.<br> 32 – 4 and 2z + 5<br><br><br> Pls help quick!
alexgriva [62]

Answer:

2z + 33

Step-by-step explanation:

Add like terms like below:

(32 - 4) + (2z + 5) = 28 + 2z + 5

Combine like terms again:

(28 + 5) + 2z = 33 + 2z or 2z + 33

7 0
3 years ago
What number should be added to both sides of the equation to complete the square?
AnnyKZ [126]
I think its 2 cuz i think its 6^2
5 0
3 years ago
A circle has a radius of five ft.
Flura [38]
A. for the circumference it is C=pi(d)=pi(2r)=pi(10)=  31.4 ft
b. for the area it is A=pi(r)^2=pi(5)^2=pi(25)= 78.5 ft squared
c. since the are is 78.5 ft squared multiply by $4.50= $353.25 to floor the circle.
6 0
2 years ago
The Jackson's dinner cost $125. They left $21.25 as a tip. What was the percentage of the tip? Please explain and help me! THANK
fiasKO [112]

Answer:

17%

Step-by-step explanation:

to find the percentage of something, you have to fill out the following formula:

x/100 = 21.25/125. Basically that is saying that some percent out of 100 is equal to 21.25 out of 125. To solve that, you have to cross multiply:

125x = 2125

then you have to divide, to single out x:

the answer is 17

so it is 17%

3 0
3 years ago
Read 2 more answers
Other questions:
  • Describe steps to simplify w(5w^3)^-2 / w^-4
    12·1 answer
  • NEED HELP-20pts- MUST SHOW STEPS AND HOW YOU DID IT
    9·1 answer
  • What is the average rate of change from x = −1 to x = 1?<br><br> −4<br> −2<br> 2<br> 4
    11·1 answer
  • If the cost for manufacturing x units of a certain product is given c=x^2 +25x +30 find the number of units manufactured at a co
    12·1 answer
  • You need to convert the recipe measure of 2 quarts to both pints and fluid ounces so you enlist the help
    7·1 answer
  • Describe the graphs of x + 3y = 6 and 2x + 6y = 12<br>​
    6·2 answers
  • Ava makes bead necklaces. She has a total of write the value of each expression.of 6,048 beads. Each necklace has 24 beads.Her f
    6·1 answer
  • Evaluate b^2c^-1 for b=8 and c=-4
    6·1 answer
  • The numbers 2,3,5, 6 are written on four tiles and placed in a bag. You draw a tile and replace it back in the bag. A second til
    12·1 answer
  • A piece of wood for a sign is shaped like a parallelogram with a base length of 14 inches and a height of 9 inches. A small tube
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!