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word problem

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by sud21 » Sun Jan 29, 2012 10:21 pm
Someone scheduled to walk 300km in 20 days. Actually, she finished 335km. Is the distance she walked each day greater than 15km?


1). Every day, she walked no more than 17km.
2). Every day, she walked more than 14km.
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Source: — Data Sufficiency |

by sam2304 » Mon Jan 30, 2012 8:44 am
IMO E.

Is the dist > 15 each day.
1. INSUFF as 15 days * 17 kms each day + 5 days * 16 kms each day = 335 will give a YES and
17 kms * 19 days + 12 km * 1 day will give a NO.

2. INSUFF 15 km * 19 days + 50 kms * 1 day = 335 => No
17 kms * 15 days + 16 kms * 5 days = 335 => YES

Combining 1 & 2
15 days * 17 kms each day + 5 days * 16 kms each day = 335 will give a YES
17 kms * 17 days + 15 * 2 days + 16 * 1 day = 335 will give a NO
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