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3 years ago

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

Mathematics

1 answer:

Nastasia [14]3 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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Answer:

<h2>The right answer is 415.4 cubic feet.</h2>

Step-by-step explanation:

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<h3> Square prism.</h3>

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First, we need to find the height of the pyramid. We already know the height of each triangular face of the pyramid, which divides equally the side.

Let's use Pythagorean's Theorem to find the height of the pyramid.

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The sum of both figures represents the total volume of the composite figure

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