Question

What is the volume of the trapezoidal right prism?
http://static.k12.com/calms_media/media/1422500_1423000/1422962/1/ecebe97b6fb223993511280716f722ba275a5d92/MS_PA_131002_171321.jpg

A.
51 m3

B.
624 m3

C.
960 m3

D.
1248 m3

Answer 1

@bibby

Answer 2

I need ur help, i found out what i got wrong on 3 and 4 (i missed them) but 1 and 2 was correct

Answer 3

The volume of a prism is the area of the base multiplied by the height.

Answer 4

same thing as before. 4 * the area of the base. find the trapezoid area where

Answer 5

Since this is a trapezoidal prism, the base is a trapezoid. You need to find the area of the trapezoid. Then multiply it by the height.

Answer 6

btw, the reason why 3 and 4 were wrong was because i had to divide my total answer by 2

Answer 7

just for future reference

Answer 8

okay

Answer 9

now what??

Answer 10

I don't know which one 3 and 4 was. I am positive the ones I did were right

Answer 11

you helped me with all of them, and it is okay if you did not know them , they were the triangle prisms

Answer 12

not rectange prism,

Answer 13

The area of a trapezoid is given by this formula:

\(\large A=\dfrac{a+b}{2}h\)

where a and b are the lengths of the bases, and h is the height.

Answer 14

so is it \[V = \frac{ 30 }{ ? }\]

Answer 15

oops

Answer 16

i meas is it V= 30 + 9/2 4

Answer 17

i am not good with the equation site

Answer 18

In your case, the bases of the trapezoid are 9 m and 30 m. the height is 8 m.
Use these dimensions to find the area of the trapezoid.
Then multiply the area of the base by the height of the prism, 4 m.

Answer 19

oh, not 4, 8

Answer 20

Correct.

\(A = \dfrac{9 + 30}{2} \times 4\)

Answer 21

is it 78??

Answer 22

wait no

Answer 23

what next

Answer 24

do i multiply 78 by 4??

Answer 25

No. My mistake.
There are two heights.
The height of the trapezoid base is 8 m.
Your formula above is correct.
\(A = \dfrac{9 + 30}{2} \times 8\) gives the area of the base.

Answer 26

oh i replaced the 8 with the 4

Answer 27

woops

Answer 28

ok hold on a sec.

Answer 29

Use 8, not 4. You were correct in the first place.
The area of the base is 156 m^2

Answer 30

Now all you need to do is mulltiply that area by the height of the prism which is 4 m.

Answer 31

IT IS B

Answer 32

624

Answer 33

am i right???

Answer 34

I multiplied 156 by 4 to get b

Answer 35

Correct.

Answer 36

which is 624

Answer 37

thx

Answer 38

oh so much!!

Answer 39

You're welcome.
Answer is 624 m^3