Could you help me with this please?

Question

anonymous · Answer

What is the surface area of the composite figure?

ganeshie8 · Answer

its a solid, lets start by calculating areas of front and back faces

ganeshie8 · Answer

area of front face = area of back face

ganeshie8 · Answer

area of front face = 5x10 + 20x5
                          = ?

anonymous · Answer

150

ganeshie8 · Answer

back face also will have the same area 150

Area front + back faces = 300 --------------(1)

anonymous · Answer

okay so we have 300 now would we do the top and bottom?

ganeshie8 · Answer

lets do that

anonymous · Answer

how would you do that?

ganeshie8 · Answer

area of top = area of bottom

ganeshie8 · Answer

if u see it from top its just 5+20 = 25 m length surface of 5m width

ganeshie8 · Answer

so Area of top = 25x5
                     = ?

anonymous · Answer

125 so the bottom is 125 as well so its 250 if you add the top and bottom so 250 + 300 = 550

anonymous · Answer

but 550 isnt an answer?

ganeshie8 · Answer

dont forget adding left and right faces

anonymous · Answer

so is it 600?

ganeshie8 · Answer

when u see it from left, u see 2 
when u see it from right, u see 2

ganeshie8 · Answer

so total 4 squares of 5x5 size

4 (25) = ?

anonymous · Answer

100 so is it 650?

ganeshie8 · Answer

yes

anonymous · Answer

Okay, i think i understand it now, if i have anymore questions can i come and ask you ?

ganeshie8 · Answer

sure :)

anonymous · Answer

Could you help em with this one here?

anonymous · Answer

What is the volume of the prism?

ganeshie8 · Answer

find the area of front triangle
multiply it with the length of prism 12yd

ganeshie8 · Answer

Area of front triangle is the base here

anonymous · Answer

so wait, can you just fine the area of one face and add them together to get the answer?

ganeshie8 · Answer

No. this is NOT surface area. this is volume

ganeshie8 · Answer

volume of prism = Bh

B = base area = ?
h = height = 12

ganeshie8 · Answer

find the base area first

ganeshie8 · Answer

base area = $\large \frac{1}{2} 6 \times 5$
          = ?

anonymous · Answer

15?

ganeshie8 · Answer

yes plugit in volume formula

ganeshie8 · Answer

volume of prism = Bh
                         = 15 x 12
                         = ?

anonymous · Answer

180

ganeshie8 · Answer

yes

anonymous · Answer

oh okay thank you very much this is actually really easy now, i really understand it thanks alot!

ganeshie8 · Answer

good :) you're wlcme :D

anonymous · Answer

hey i have one question what are two methods of finding the volume of this picture? like you could put it into two rectangles what is another way?

anonymous · Answer

@ganeshie8