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Before a salary hike, the weekly salary of a worker for 40 [#permalink]

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10 Nov 2012, 14:04

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A

B

C

D

E

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25% (medium)

Question Stats:

76% (02:45) correct
24% (01:54) wrong based on 212 sessions

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Before a salary hike, the weekly salary of a worker for 40 hours in a week was as much as he is paid now for 35 hours of work in a week. What is the percent increase in his salary for an hour?

Before a salary hike, the weekly salary of a worker for 40 hours in a week was as much as he is paid now for 35 hours of work in a week. What is the percent increase in his salary for an hour?

A. 11 1/3 B. 12 1/4 C. 13 1/5 D. 14 2/7 E. 15

Say the worker used to get $40 for 40 hrs i.e. $1 per hr. Now he gets $40 for 35 hrs i.e. 40/35 = $8/7 per hr

Hike is $1/7 per hr i.e. (1/7)*100 = 14 2/7 %
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Re: Before a salary hike, the weekly salary of a worker for 40 [#permalink]

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25 Sep 2013, 03:08

Suppose Per hour paid=x dollars, So total paid 40x and 35x dollars Now percent increase=(40x-35x)/35x=(5x/35x)*100=100/7=14.28...So D is the ans.
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Re: Before a salary hike, the weekly salary of a worker for 40 [#permalink]

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28 Nov 2014, 15:55

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Re: Before a salary hike, the weekly salary of a worker for 40 [#permalink]

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22 Nov 2015, 11:30

i solved as above said: 1/7 is between 1/6 and 1/8 which means the increase is 12.5% < x < 16% we can eliminate A and B right away. since we have 7 as denominator, and since we need to find 100/7, we clearly see that 100 is not divisible by 7, and thus the answer choice should be a number with a denominator 7.

only D has such, and it falls between the given spread of increase.

gmatclubot

Re: Before a salary hike, the weekly salary of a worker for 40
[#permalink]
22 Nov 2015, 11:30

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