Ask your own question, for FREE!
Mathematics 7 Online
OpenStudy (anonymous):

Artie made a solid wooden block as shown in the diagram below. He will paint all surfaces of the block. What will be the total painted surface area of the block?

OpenStudy (anonymous):

OpenStudy (eyust707):

now instead of doing volume, we are doing area

OpenStudy (anonymous):

yes

OpenStudy (eyust707):

now instead of using three number times each other we use two

OpenStudy (anonymous):

because it is squared

OpenStudy (eyust707):

correct!

OpenStudy (eyust707):

there are 6 "faces" to that shape

OpenStudy (eyust707):

we need to find the area of each one then add them all together

OpenStudy (anonymous):

k...

OpenStudy (anonymous):

you find regular area, right?

OpenStudy (anonymous):

like 12 times 4=48?

OpenStudy (eyust707):

yep thats the first one

OpenStudy (eyust707):

5 more...

OpenStudy (anonymous):

there are two trapezoids...

OpenStudy (eyust707):

correct

OpenStudy (anonymous):

and three other rectangles...

OpenStudy (eyust707):

lets do the three rectangle first..

OpenStudy (anonymous):

so another 12 times 4=48?

OpenStudy (anonymous):

48+48=96

OpenStudy (eyust707):

nope

OpenStudy (anonymous):

oh man

OpenStudy (eyust707):

wheres the other 12 x 4???

OpenStudy (anonymous):

I thought it would magically appear on the other side...

OpenStudy (eyust707):

nope its slanted so its longer

OpenStudy (eyust707):

but they tell you what it is

OpenStudy (anonymous):

12 times 5?

OpenStudy (eyust707):

correct!

OpenStudy (anonymous):

12 times 5=60+48=108

OpenStudy (eyust707):

good

OpenStudy (anonymous):

12 times 7=84?

OpenStudy (eyust707):

yes

OpenStudy (anonymous):

84+108=192

OpenStudy (eyust707):

yep

OpenStudy (anonymous):

12 times 10=120?

OpenStudy (eyust707):

yes

OpenStudy (anonymous):

120+192=312

OpenStudy (eyust707):

correct

OpenStudy (eyust707):

now the two trapezoids

OpenStudy (anonymous):

the leg of the first trapezoid is 5 while the base is 10?

OpenStudy (anonymous):

at least one of the bases...

OpenStudy (eyust707):

no

OpenStudy (eyust707):

one leg is 10.. but the other is...

OpenStudy (anonymous):

5 is the base then?

OpenStudy (eyust707):

|dw:1340151496583:dw|

OpenStudy (anonymous):

are there two legs or two bases?

OpenStudy (eyust707):

5 is the slant

OpenStudy (anonymous):

5 is the height?

OpenStudy (eyust707):

on the other side of the shape they give us the other two dimensions...

OpenStudy (anonymous):

7 is the other leg?

OpenStudy (eyust707):

yes!

OpenStudy (eyust707):

|dw:1340151581797:dw|

Can't find your answer? Make a FREE account and ask your own questions, OR help others and earn volunteer hours!

Join our real-time social learning platform and learn together with your friends!
Can't find your answer? Make a FREE account and ask your own questions, OR help others and earn volunteer hours!

Join our real-time social learning platform and learn together with your friends!