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On a turntable, a record of radius 6 inches is rotating at t

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On a turntable, a record of radius 6 inches is rotating at t [#permalink] New post 08 May 2018, 16:34
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Question Stats:

74% (00:53) correct 25% (00:51) wrong based on 90 sessions
On a turntable, a record of radius 6 inches is rotating at the rate of 45 revolutions per minute.

Quantity A
Quantity B
The number of inches traveled per minute by a point on the circumference of the record
The number of inches traveled per minute by a point on the record 5 inches from the center of the record



A)The quantity in Column A is greater.
B)The quantity in Column B is greater.
C)The two quantities are equal.
D)The relationship cannot be determined from the information given.
[Reveal] Spoiler: OA

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Re: On a turntable, a record of radius 6 inches is rotating at t [#permalink] New post 09 May 2018, 08:37
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We dont have to do math to answer this question. as A is farther from center it travel more distance than B.
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Re: On a turntable, a record of radius 6 inches is rotating at t [#permalink] New post 19 Jan 2019, 16:19
mohan514 wrote:
We dont have to do math to answer this question. as A is farther from center it travel more distance than B.

correct
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Re: On a turntable, a record of radius 6 inches is rotating at t [#permalink] New post 24 Jun 2020, 23:25
Carcass wrote:
On a turntable, a record of radius 6 inches is rotating at the rate of 45 revolutions per minute.

Quantity A
Quantity B
The number of inches traveled per minute by a point on the circumference of the record
The number of inches traveled per minute by a point on the record 5 inches from the center of the record



A)The quantity in Column A is greater.
B)The quantity in Column B is greater.
C)The two quantities are equal.
D)The relationship cannot be determined from the information given.



May someone explain it for me ?
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Re: On a turntable, a record of radius 6 inches is rotating at t [#permalink] New post 25 Jun 2020, 06:29
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Carcass wrote:
On a turntable, a record of radius 6 inches is rotating at the rate of 45 revolutions per minute.

Quantity A
Quantity B
The number of inches traveled per minute by a point on the circumference of the record
The number of inches traveled per minute by a point on the record 5 inches from the center of the record




Let's examine 2 points.
Point A is on the circumference of the record (in other words, point A is 6 inches from the center)
Point B is 5 inches from the center

After 1 revolution of the record, point A has traveled a distance equal to the circumference of a circle with radius 6 inches.
After 1 revolution of the record, point B has traveled a distance equal to the circumference of a circle with radius 5 inches.

So, after 1 revolution, point A travels further.
In 1 minute, each point will have made the same number of revolutions.
So, point A will definitely travel further than point B.

Quantity A > Quantity B

Answer: A
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Re: On a turntable, a record of radius 6 inches is rotating at t   [#permalink] 25 Jun 2020, 06:29
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