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A and B can run one full round of a circular track in 8 minutes and 15

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Math Expert
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Joined: 02 Sep 2009
Posts: 61403
A and B can run one full round of a circular track in 8 minutes and 15  [#permalink]

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New post 06 Jan 2020, 06:54
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A
B
C
D
E

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  45% (medium)

Question Stats:

67% (01:38) correct 33% (01:15) wrong based on 9 sessions

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A and B can run one full round of a circular track in 8 minutes and 15  [#permalink]

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New post 06 Jan 2020, 07:06
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Bunuel wrote:
A and B can run one full round of a circular track in 8 minutes and 15 minutes respectively. If they start simultaneously and run in same direction, after how much time will they meet for the first time?

A. 24 mins
B. 120/7 mins
C. 120/17 mins
D. 120/23 mins
E. 120 mins



Let the length of circular track be x meters;

Speed of A = (x/8)

Speed of B=(x/15)

Time taken for them to meet= Distance/ speed of A - Speed of B (since they are running in the same direction)

Time taken for them to meet= X/(x/8)-(x/15)

Time taken for them to meet= 120/7 mins
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A and B can run one full round of a circular track in 8 minutes and 15   [#permalink] 06 Jan 2020, 07:06
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A and B can run one full round of a circular track in 8 minutes and 15

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