Awinery has a vat with two pipes leading to it. the inlet pipe can fill the vat in 3 hours, while the outlet pipe can empty it in 7 hours. how long will it take to fill the vat if both pipes are left open

  5 1/4 hours

Step-by-step explanation:

The rate of filling is 1/3 vats per hour. The rate of emptying is 1/7 vats per hour, so the net rate of filling is ...

  (1/3) -(1/7) = 4/21 . . . . vats per hour

Then for filling one vat, it will take an amount of time that is the inverse of this:

  21/4 = 5 1/4 . . . hours per vat

If both pipes are left open, the vat will fill in 5 1/4 hours.

b i think

step-by-step explanation:

not really sure

42%

step-by-step explanation:

we know,

total people = 60

total males = 25

percentage of males

= 25/60 × 100

= 25/6 × 10

= 25/3 × 5

= 125 / 3

= 41.

rounding of = 42%

happy to

pls mark as brainliest