Answer:
12.25.
Step-by-step explanation:
1) the formula of the volume given in the condition is:
V=2*2/7*10x.
2) If V=70, then
2*2/7*10x=70, where x=12.25.
(10x)(7/4)(2)=70
=10x=70/7/4/2
=10x=20
x=2
Answer: 2
