Question

The pentagonal pyramids are similar
h/H=4/7
Volume of large pyramid = ?
Volume of small pyramid = 320 cm3

Answer 1

use ratio and cross mutip
4/7= 320/H
4H=(7*320)
4H=2,240
H = 560
Volume of large pyramid =560
If I deserve medal then give me one.

Answer 2

http://openstudy.com/groups/mathematics#/groups/mathematics/updates/4dcc90b68bbf8b0bfc8cf37a

Answer 3

this one very hard,

Answer 4

i know that is hard to but if u couldn't do it then i ask my friend tomorrow

Answer 5

I will try I get back to you later, I have help the boy geomertry home work now

Answer 6

I will try the best OK

Answer 7

ok

Answer 8

hey and here http://openstudy.com/groups/mathematics#/groups/mathematics/updates/4dcc66918bbf8b0babf3f27a

Answer 9

wait what the ratio for this??

Answer 10

the only i can do it write eqution ,can't answer number
I can find EF = (DC+AB)/2
EF = (20+36)/2=28
28 = EX+XY+YF
XY = 28-(EX+YF)
If teacher give you a number you can plug in and solve
I can go any more father

Answer 11

oh ok