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On a tuned piano, a certain B string vibrates 494 times per second. If

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Math Expert
Joined: 02 Sep 2009
Posts: 58464
On a tuned piano, a certain B string vibrates 494 times per second. If  [#permalink]

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08 Mar 2019, 02:59
00:00

Difficulty:

45% (medium)

Question Stats:

67% (01:53) correct 33% (02:01) wrong based on 33 sessions

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On a tuned piano, a certain B string vibrates 494 times per second. If this B string vibrates 1.06 times as rapidly as the B-flat string next to it approximately how many times per second does the B-flat string vibrate?

A. 455
B. 456
C. 466
D. 488
E. 524

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Re: On a tuned piano, a certain B string vibrates 494 times per second. If  [#permalink]

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08 Mar 2019, 04:20
Bunuel wrote:
On a tuned piano, a certain B string vibrates 494 times per second. If this B string vibrates 1.06 times as rapidly as the B-flat string next to it approximately how many times per second does the B-flat string vibrate?

A. 455
B. 456
C. 466
D. 488
E. 524

494=1.06* b flat
b flat = 494/1.06
IMO C 466
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Joined: 01 Feb 2017
Posts: 243
On a tuned piano, a certain B string vibrates 494 times per second. If  [#permalink]

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09 Mar 2019, 14:30
Freq of B-flat= 494/1.06 = 494*100/106 = (2*13*19*100)/(2*53)= (52*19*50)/(2*53) = approx on higher side = 19*25 = 475

Closest value below 475: Ans C / 466

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On a tuned piano, a certain B string vibrates 494 times per second. If   [#permalink] 09 Mar 2019, 14:30
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