Someone me it's worth ten points and i'm marking ppl as brainless if you me make a 100

V=(1/3)Ah
A=a*b for squares and a*b/2 for right triangles

1)
A=6*8.5=51
V=51*12/3=51*4=204in^3

2)
A=12*6=72
V=72*15/3=72*5=360ft^3

3)
A=18*24/2=18*12=216
V=216*35/3=72*35=2520cm^3

4)
A=26*15/2=13*15=195
V=195*38/3=65*38=2470cm^3

5)
A=B=8ft^2
V=8*12/3=8*4=32ft^3

2.) is the most sense