Pleaseeeee help me with number 7 I will give Brainly to whoever comments the answer right

Answer:
- to find r3 multiply 1700 by itself 3 times
- r3 is 4913000000
- multiply by pi
- the units are kilo meters cubed
Step-by-step explanation:
ugh i suck at math but here goes, sorry if it was wrong :)