Answer:
6
Step-by-step explanation:
I'm going to assume that this is a right triangle
which means that
3x²+6²=19²
9x²+36=361
9x²=325
3x=18.0277
x=6
96π
V=96π
1block=2cm
1cm=10mm
therefore 1block=2×10=20
1000÷20=50
=50blocks
the answer to your question is B.) 12x
