Question

find the surface area of the figure

Answer 1

you have the formula for surface area of prism ?

Answer 2

yes but i dont understand it .....

surface area=L.A.+2(base)
lateral area=ph

Answer 3

yes
base means base area
for a prism, base = rectangle
so you just need sides of base to get the base area, can you find it?

Answer 4

10 & 5 i think

Answer 5

yes!
so base area =.. ?

Answer 6

50 units^2

Answer 7

correct :)
now you see there are 4 vertical surfaces, all rectangles
2 of which have same area, and other 2 have same area,
if you can find dimension, then you already know how to get the area :)

Answer 8

what do you mean.....are you talking about the height value here

Answer 9

yes, the 4 vertical surfaces, all are rectangles , right ?
like 2 of them have dimensions, 4ft(height) and 5 ft

Answer 10

so i need to do
2(4*5)

Answer 11

correct.
now only 2 surfaces remain, what is the dimension ?

Answer 12

2(10*4)

Answer 13

correct!
now add all of them :)

Answer 14

80+40+100=220
220 ft^2

Answer 15

absolutely correct :)

Answer 16

the formula is,
Total surface area = 2 (length*breadth + breadth*height + length*height)

Answer 17

oh ok i see now thanks @hartnn

Answer 18

welcome ^_^