Answer:
8/15
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Answer is 432 cans in total
18 packs times 24 cans in each is 432
Attached the solution with work shown.
R/2-6=14
r/2=20
r=40
The answer is 40
Work= forcexdistance
force=55x10(or 9.8 depending on which gravitational field strength you use)
force= 550N
work = 550x0.2
work= 110J
six steps=110x6=660J