EMPOWERgmatRichC wrote:
EMPOWERgmat PS Series:
Block 1, Question 2
A tank is filled to 75% of its capacity with water. If P pounds of water would fill 60% of the tank, then how many additional pounds of water, in terms of P, must be added to the tank to fill the current 75% up to 100%?
A. P/4
B. 2P/5
C. 5P/12
D. 14P/27
E. 20P/33
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Let the capacity = 100 Liter
Then 75% of capacity= 75 Liter & 60% of capacity= P =60
We need 25 Liter to increase water from 75% to 100%
A. P/4 = 60/4 =15.........................
Eliminate B. 2P/5 = 2*60/5=24.....................
Eliminate C. 5P/12 =5*60/12 =25.....................
KeepD. 14P/27=14*60/27=non integer......
Eliminate E. 20P/33=20*60/33=non integer......
Eliminate Answer: C