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% change!

by Ahmed MS » Wed Jun 15, 2011 11:59 pm
The rate of a reaction is directly proportional to the square of the concentration of A and inversely proportional to concentration of B. If B increases by 100%, which of the following is closest to the % change in concentration of A required to keep the rate unchanged?

a. 100% decrease
b. 50% decrease
c. 40% decrease
d. 40% increase
e. 50% increase

Original answer is D. As usual failed to understand!

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by Roy@MasterGmat » Thu Jun 16, 2011 12:25 am
Hi,

This question was posted a couple of days ago. The thread, including my explanation, can be found in the following link:

https://www.beatthegmat.com/rates-t85208.html#377148
Roy
Master GMAT
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