Answer: D is correct.
Step-by-step explanation:
V1=4/3TTR^3
V2=4/3TT(R/2)^3
V2/V1=R^3/8 / R^3=1/8
Answer:
10
130+40+x =180
x=10
option 2 is correct
D=12/132=165/h
Hope dis helps! :D