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max2010maxim [7]
3 years ago
13

Help me pls pls pls help pls pls pls

Mathematics
1 answer:
Burka [1]3 years ago
8 0

Answer:

Triangle 1: 9

Square: 57.76

Triangle 2: 20.91

Step-by-step explanation:

Square area formula: area=side^{2}

Triangle: area=\frac{height x base}{2}

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3 years ago
A gas station stores its gasoline in a tank underground. The tank is a cylinder lying horizontally on its side. The radius is 5
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Answer:

The exact work required to pump all the gasoline to the surface of the ground is π × 5.094 × 10⁶ j

Step-by-step explanation:

Here, we note that volume of a slice is given by

Length × Width × Height

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Since the slice height is Δy ft thick and located y ft above the center of the cylinder, then

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∴ Width of slice = 2 × √(25 - y²)

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Mass of slice then = 42 × 15 ×2 × √(25 - y²)×Δy = 1260 × √(25 - y²)×Δy

The force required to lift the slice is the weight of the slice, which is given by

32.2 × 1260 × √(25 - y²)×Δy = 40572 × √(25 - y²)×Δy N (Newtons)

The work done by the force is the product of the force and the distsnce through which the force acts.

Work done = 40752×(10-y) × √(25 - y²)×Δy

Therefore total work done is given by

W = \int\limits^5_{-5} {40752\times (10-y) \times \sqrt{ (25 - y^{2} )} } \, dy

 

= 5094000·π J = π × 5.094 × 10⁶ j

The exact work required to pump all the gasoline to the surface of the ground = π × 5.094 × 10⁶ j

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