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Beth lives 40 blocks from her office. To get to work, she ca
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28 May 2019, 11:25
28 May 2019, 11:25
Expert Reply
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Question Stats:
50% (00:45) correct
50% (01:59) wrong based on 4 sessions
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Beth lives 40 blocks from her office. To get to work, she can walk, which takes 45 seconds per block, or she can take the subway, which takes z seconds per block. If she could wait for the subway for 20 minutes and arrive at her office at exactly the same time she would have arrived by walking, then z is
A. 10
B. 13
C. 14
D. 15
E. 20
A. 10
B. 13
C. 14
D. 15
E. 20
Re: Beth lives 40 blocks from her office. To get to work, she ca
[#permalink]
28 May 2019, 19:38
28 May 2019, 19:38
1
Carcass wrote:
Beth lives 40 blocks from her office. To get to work, she can walk, which takes 45 seconds per block, or she can take the subway, which takes z seconds per block. If she could wait for the subway for 20 minutes and arrive at her office at exactly the same time she would have arrived by walking, then z is
A. 10
B. 13
C. 14
D. 15
E. 20
A. 10
B. 13
C. 14
D. 15
E. 20
(40 * 45) = (40 * z) + (20 * 60)
z = 15 seconds
gmatclubot
Re: Beth lives 40 blocks from her office. To get to work, she ca [#permalink]
28 May 2019, 19:38
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