Respuesta :
Answer:
Step-by-step explanation:
First you need to find the volume of the rectangle.
V=LHW
V=2*4*3
V=24
Then you need to find the volume of the cone
V=1/3 pi r^2h
V=1/3 pi 5^2(9)
V=1/3 pi 25(9)
V= 1/3 pi 225
V=1/3 706.5
V=235.5
Now divide 235.5 by 24 and you get 9.8125
So he needs 10 blocks