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06 Mar 2022, 21:00
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Question 1
E
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
75%
(hard)
Question Stats:
35% (01:53) correct
66%
(02:02) wrong
based on 400
sessions
History
Date
Time
Result
Not Attempted Yet
Question 2
D
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
85%
(hard)
Question Stats:
32% (01:16) correct 68%
(01:06) wrong
based on 384
sessions
History
Date
Time
Result
Not Attempted Yet
Question 3
B
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
95%
(hard)
Question Stats:
35% (01:44) correct 65%
(01:27) wrong
based on 355
sessions
History
Date
Time
Result
Not Attempted Yet
A paper plane should be made by folding a single sheet of A4 (\(8\frac{1}{2}\) in × 11 in) paper and not involve any cuts or the addition of anything such as sticky tape, glue, or weights.The indoor flight record for such a plane is over 60 m. The aerodynamics involved are as complex as the principles behind any plane, but the secret to one built from paper is the ease of construction, folds that impart strength, the correct location of the center of balance, minimum drag and maximum lift. The key to a successful design is the nose and wing shape. The best designs seem to involve a blunt nose made from multiple folds. This makes the craft strongest at the point of impact in the (hopefully) many crash landings. It also sets the center of gravity further back than on a pointed nose design and so affords more stable flight. The wing shape that affords the longest flights is delta, which is cambered upwards to increase lift by forcing the air as it passes over the wing through a greater angle. A plane with such wings is capable of flight in excess of 20 seconds when launched from a height of 2 m in still air. Outside, where wind conditions and thermal lifts may be harnessed, flights may last considerably longer and go much further than 60 m.
1. The secret to the ultimate paper plane is best summed up as:
A. a plane with delta-shaped wings
B. getting the balance and shape right
C. the design of the nose and wing
D. using sticky tape, glue and weights
E. complex aerodynamic principles captured by simplicity of design
A. a plane with delta-shaped wings
B. getting the balance and shape right
C. the design of the nose and wing
D. using sticky tape, glue and weights
E. complex aerodynamic principles captured by simplicity of design
2. Which of the following points is made in the passage?
A. The nose should be heavy so as to realize stable flight.
B. The center of gravity should be towards the back to prevent stalling.
C. Viewed from the front the wings should give the plane a ‘v’ shape.
D. Wings should be slightly convex so that they increase lift.
E. The plane should have a pointed nose design.
A. The nose should be heavy so as to realize stable flight.
B. The center of gravity should be towards the back to prevent stalling.
C. Viewed from the front the wings should give the plane a ‘v’ shape.
D. Wings should be slightly convex so that they increase lift.
E. The plane should have a pointed nose design.
3. Which of the following statements, if true, would most weaken the case made in the passage?
A. A paper plane should be made using cuts, glue and weights.
B. A flight of over 30 seconds has been achieved by a plane without delta wings made from a single sheet of paper only, in an indoor test where the air was still.
C. A paper plane made using cuts, glue and sticky tape would fly further than 60 m if launched indoors in still air.
D. A flight of over 60 m has been achieved by a plane made only from a single sheet of paper but with a pointed nose.
E. A flight of over 30 seconds has been achieved by a plane made from only a single sheet of paper with a pointed nose.
A. A paper plane should be made using cuts, glue and weights.
B. A flight of over 30 seconds has been achieved by a plane without delta wings made from a single sheet of paper only, in an indoor test where the air was still.
C. A paper plane made using cuts, glue and sticky tape would fly further than 60 m if launched indoors in still air.
D. A flight of over 60 m has been achieved by a plane made only from a single sheet of paper but with a pointed nose.
E. A flight of over 30 seconds has been achieved by a plane made from only a single sheet of paper with a pointed nose.
Source: How to pass the GMAT
19 Apr 2022, 10:41
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Official Explanation
Q3. Which of the following statements, if true, would most weaken the case made in the passage?
Explanation
Answer A sums up the opening statement of the passage but does not weaken the case made within the passage. A plane built using these items might fly further but this is not the subject of the passage. A paper plane made only from a single sheet of paper that has a pointed nose or non-delta wings would weaken the case only if it was an indoor test in still air. B is the only statement that complies with all these requirements.
Answer: B
Explanation
Answer A sums up the opening statement of the passage but does not weaken the case made within the passage. A plane built using these items might fly further but this is not the subject of the passage. A paper plane made only from a single sheet of paper that has a pointed nose or non-delta wings would weaken the case only if it was an indoor test in still air. B is the only statement that complies with all these requirements.
Answer: B
03 Dec 2022, 10:38
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Official Explanation
Q1. The secret to the ultimate paper plane is best summed up as:
Difficulty Level: 700
Explanation
Answer E embraces the widest number of design aspects and so provides the best summary.
Answer: E
Difficulty Level: 700
Explanation
Answer E embraces the widest number of design aspects and so provides the best summary.
Answer: E
