beanokelley
beanokelley beanokelley
  • 22-10-2018
  • Mathematics
contestada

can someone please explain this t me im lost

can someone please explain this t me im lost class=

Respuesta :

dclary2002
dclary2002 dclary2002
  • 22-10-2018

Answer:

166

I don't know how to explain it because i used a special Surface Area calculator




Answer Link
loma1461
loma1461 loma1461
  • 22-10-2018

The equation for surface area is A=2(wl+hl+hw) , so step by step

L=7

w=5

h=4

2(wl) +2(hl)+ 2(hw) = 2(7x5) + 2 (4 x 7) + 2 ( 5 x 4)

                               = 2 (35) + 2 ( 28) + 2 ( 20)

                              = 70 + 56 + 40

                              = 166

so the surface area would be 166

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