2 Questions on Volume

a) Yes he does have enough small prisms. (16)
b) v= b x h1/2 x h2
v=1.4 x 1.7/2 x 1.8

v= 1.19 x 1.18
v= 1.4042

v= 1.4042 x 16squares= 22.46m3

4. a) v= pi.r.r.h

v= (3.14.5.5).23

v=78.5 x 23

v= 1805.5cm3

b) v= pi.r.r.h

v= (3.14.14.14).12

v= 7385.28cm3