The three rectangles can be combined into one large one.
Area of a rectangle is l*w.
l= 5+6+5= 16
w= 8
16*8=128 cm^2
Then calculate the triangle area using bh/2.
6*4/2= 12 cm^2
Multiply by 2 since there are 2 of them.
12*2=24 cm^2
Add the values.
24+128= 152 cm^2
Final answer: B