h- 6
a= 15
b- 19-15=4
= 2*ab
= 2*15*4
=120
Ob= 3a+3b+(a-b)
Ob= 3a+3b+a-b
Ob =4a+2b
Ob= 4*15+2*4
Ob= 68
= Ob*h
=68*6
= 408
V= *h
V=120*6
V=720
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h- 6
a= 15
b- 19-15=4
= 2*ab
= 2*15*4
=120
Ob= 3a+3b+(a-b)
Ob= 3a+3b+a-b
Ob =4a+2b
Ob= 4*15+2*4
Ob= 68
= Ob*h
=68*6
= 408
V= *h
V=120*6
V=720