QUESTION: 141

In a rectangular axis system, what is the distance between the following points: A(24.4,30) and B(34.4,42.49) ?

Answer(s): A

Explanation:

First, draw a rectangular axis system and mark the two points.
The easiest way to find the distance between them is to draw a triangle, where the line AB is the hypotenuse. You can see that the length of one side of the triangle is (34.4 – 24.4 = 10) and the other side is (42.49 – 30 = 12.49). The length of the line AB is received with the help Of the Pythagoras principle.

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QUESTION: 142

In a rectangular axis system, what is the area of a parallelogram with the coordinates: (5,7), (12,7), (2,3), (9,3)?

Answer(s): B

Explanation:

First, draw the axis system and mark the 4 points. Connect the points to get a parallelogram. The area is calculated by the multiplication of one on of the bases and the height. The height is (7 – 3 = 4), the length of the base is (9 – 2 = 7). The area is 4 x 7 = 28.

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QUESTION: 143

If the radius of a cylinder is doubled and so is the height, what is the new volume of the cylinder divided by the old one?

Answer(s): A

Explanation:

The volume of a cylinder is (pie x R2) x (height of cylinder). The new volume is (4 x 2 = 8) bigger.

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QUESTION: 144

If the radius of a cylinder is doubled and so is the height, how much bigger is the new lateral surface area (without the bases)?

Answer(s): D

Explanation:

The lateral surface area of a cylinder is (2 x pie x R) x (height of cylinder).
The new lateral surface area is (2 x pie x 2R) x (double the height) = 4 times bigger.

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Free GMAT SECTION 2: QUANTITATIVE Exam Braindumps (page: 36)

QUESTION: 141

Explanation:

QUESTION: 142

Explanation:

QUESTION: 143

Explanation:

QUESTION: 144

Explanation: