2х-8у=5
х-4у=5/2
х=2,5+4у у=(х-2,5)/4
2
.х+у=6 х=6-у х=5
3х-8у=7 3(6-у)-8у=7 18-3у-8у=7 11у=11 у=1
4х+5у=8 4(3у-15)+5у=8 12у-60+5у=8 17у=68 у=4
х-3у=-15 х=3у-15 х=-3
The cylinder has volume •πR'2h•
So,transfer radius and length in metre values.
So:
R = 0.8m
L = 2m
V = πR'2h = 12.8π ~ 40.21(m'3)
The half of V = 40.21/2 ~ 20.1(m'3)
1m'3 has 1000 litres.
So, 20.1m'3 have 20.1*1000 = 20.100 litres.
20.100/120 = 167.5 days.
Answer: 167.5 days.