Question

Help, find the surface area of the composite solid.

Answer 1

I got this one wrong..

Answer 2

first of all find the surface area of upper one then the lower one then add them

Answer 3

How do i find the surface area, adding?

Answer 4

Im not sure.since i got it wrong last time i tried.

Answer 5

oj you can find the curved surface area of upper one using this
perimeter times height

Answer 6

p * h= 40*10=400

Answer 7

don't count the base area of the uppre one

Answer 8

you mean the 5 or the 15?

Answer 9

is there any 15 ?

Answer 10

5 or 13*

Answer 11

for the uppe one use perimeter times height
that is perimeter = (5+12+13)

Answer 12

and height will be 10

Answer 13

for the lower one use 2h(l+b)

Answer 14

30*10=300

Answer 15

don't you multiply it by 2 since there are 2 triangles at the top?

Answer 16

20(12+10) ??

Answer 17

and in this case height is 10 and breadth and lenght is 10 and 12

Answer 18

krit upper figure, we have added extra of 10x12 and missed the two triangles

Answer 19

wait..im confused now.. am i doing it wrong?

Answer 20

yah @ ganeshie8

Answer 21

Id say start over nowthatyou have a figure infront of you.

Answer 22

Can you identify what the bases for the two figures are first?

Answer 23

You want to identify the bases because when you're calculating Surface Area, you do not want to include the bases in your calculations.

Answer 24

12 and 13?

Answer 25

The bases are not just numbers, but rather areas of figures.

Answer 26

oh..so 5 + 13= 18 is the base of the triangle?

Answer 27

bases.