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A violinist needs 2 hours to tune a violin made in the twentieth centu

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A violinist needs 2 hours to tune a violin made in the twentieth centu  [#permalink]

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New post 20 Feb 2019, 00:17
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A
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Question Stats:

88% (01:32) correct 12% (02:23) wrong based on 42 sessions

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A violinist needs 2 hours to tune a violin made in the twentieth century. To tune violins made before the twentieth century, the violinist needs twice as long, and for violins made after the twentieth century, she needs half as long. Which of the following groups of violins could she tune in 6 hours?


I. Three violins made during the twentieth century
II. Two violins made after the twentieth century, and one made before
III. Two violins made after the twentieth century, and two made during the twentieth century

A. I only
B. II only
C. III only
D. II and III only
E. I, II and III

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Re: A violinist needs 2 hours to tune a violin made in the twentieth centu  [#permalink]

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New post 20 Feb 2019, 01:31
Answer is E .

option 1 = 6 hours possible
option 2 = 5 hours possible
options 3 = 6 hours posaible

hence option E .

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Re: A violinist needs 2 hours to tune a violin made in the twentieth centu  [#permalink]

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New post 20 Feb 2019, 02:37
Bunuel wrote:
A violinist needs 2 hours to tune a violin made in the twentieth century. To tune violins made before the twentieth century, the violinist needs twice as long, and for violins made after the twentieth century, she needs half as long. Which of the following groups of violins could she tune in 6 hours?


I. Three violins made during the twentieth century
II. Two violins made after the twentieth century, and one made before
III. Two violins made after the twentieth century, and two made during the twentieth century

A. I only
B. II only
C. III only
D. II and III only
E. I, II and III


in 20th centrury ; 2 hrs before 20th c = 4 hrs and after 20th century 1 hr
so from given options


I. Three violins made during the twentieth century; 2* 3 ; 6 hrs
II. Two violins made after the twentieth century, and one made before; 2*1+ 4*1 ; 6 hrs
III. Two violins made after the twentieth century, and two made during the twentieth century; 2*1+ 2*2 = 6 hrs
IMO E
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Re: A violinist needs 2 hours to tune a violin made in the twentieth centu   [#permalink] 20 Feb 2019, 02:37
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