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2 years ago

(1) 16 liters of kerosene is needed for 12 stoves 14

Mathematics

1 answer:

Nastasia [14]2 years ago

6 0

9514 1404 393

Answer:

12 liters

Step-by-step explanation:

The kerosene usage is assumed to be jointly proportional to the number of stoves and the number of hours. That is ...

v = k·s·h . . . . . for s stoves running h hours

Then the value of k is ...

k = v/(sh) = (16 L)/(12·14) = 2/21 . . . . liters per stove-hour

Then the volume of kerosene required for 7 stoves and 18 hours is ...

v = (2/21)·s·h

v = (2/21)(7)(18) = 12 . . . liters

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