Question

surface area of solids :) pic in comments

Answer 1

Surface area of rectangular prism is
\(2\times (length \times height + height \times width + length \times width)\)

Answer 2

? dont i have to find the area of each face on the prism and the add those all together
? i did that but go 44

Answer 3

exactly!

i have just written the formula to do that.

there will be 6 rectangular faces.

Answer 4

2 faces with areas \(2\times 3\) each.

2 faces with areas \(2\times 4\) each.

2 faces with areas \(4\times 3\) each.

Answer 5

makes sense?

add all of them

Answer 6

40?

Answer 7

2*3= 6
2*4 =8
3*4 = 12

2(6+8+12) = ...

Answer 8

wait no, no i messed up, 52!

Answer 9

yes! :)

Answer 10

okay thanks, i see what i was doing wrong XD much appreciated!!

Answer 11

welcome ^_^