3. What line forms when a plane and a cylinder intersect?

1 answer:

6 0

The answer to this depends on the angle at which they intersect. If it intersects the cylinder perpendicular to the axis then a circle is formed. If the plane intersects the cylinder at an angle, it will form an ellipse. This will be true until the plan is parallel with the axis of the cylinder. At that point, the surface will become a rectangle.

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In a certain chemical, the ratio of zinc to copper is 3 to 16. A jar of the chemical contains 736 grams of copper. How many gra

evablogger [386]

The jar has 138 grams of zinc.

Solution:

Given that , In a certain chemical reaction, the ratio of zinc to copper is 3 to 16.

A jar of the chemical contains 736 grams of copper.

We have to find how many grams of zinc does it contain

Let "n" be the grams of zinc needed for 736 grams of copper

Now, we know that,

16 grams of copper ⇒ 3 grams of zinc

Then, 736 grams of copper ⇒ n grams of zinc

So, by criss cross multiplication,

$n \times 16 = 3 \times 736$

16n = 3 x 736

16n = 2208

n = 138

Hence, the jar has 138 grams of zinc.

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