Question

Ari is painting blocks of wood for a project each block is 8 cm long 4cm wide and 5cm high what is the surface are of each block ?

Answer 1

(8+4)*2*4+2(8*4)
=96          +64
=          160

Answer 2

Ari is painting blocks of wood for a project each block is 8 cm long 4cm wide and 5cm

so,

length=l=8cm

width=w=4cm

height=h=5cm

Since, it is rectangular box

so, we can use surface area formula

$SA=2(l*w+w*h+l*h)$

now, we can plug values

$SA=2(8*4+4*5+8*5)$

$SA=184cm^2$

So, surface area of each block is 184cm^2.................Answer