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Mathematics
Problem
Water flows into a tank at a rate given by
r
(
t
)
=
3
t
r(t)=3t
r
(
t
)
=
3
t
liters per hour, where
t
t
t
is the time in hours since filling began. The tank is initially empty. At what time
t
t
t
(in hours) has exactly
27
27
27
liters of water flowed into the tank? a)
9
9
9
b)
2
3
2\sqrt{3}
2
3
c)
3
2
3\sqrt{2}
3
2
d)
3
3
3
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