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28 Aug 2009, 06:23
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Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
(N/A)
Question Stats:
100% (00:00) correct
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wrong
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George can fill Q cans of paint in 3 minutes. If there are R cans of paint in one gallon, how many gallons can George fill in 45 minutes?
a. 30R/Q
b. 15R/Q
c. 30Q/R
d. 5Q/R
e. 15Q/R
OA Please explain
a. 30R/Q
b. 15R/Q
c. 30Q/R
d. 5Q/R
e. 15Q/R
OA Please explain
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28 Aug 2009, 06:31
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his speed = Q/3 cans per min
total cans he can fill = (45 x Q/3) cans
Total gallons he can fill = (45 x Q/3) cans / ( R )cans/gallon = 15Q/R gallons..OA E
total cans he can fill = (45 x Q/3) cans
Total gallons he can fill = (45 x Q/3) cans / ( R )cans/gallon = 15Q/R gallons..OA E
28 Aug 2009, 07:39
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I use this method for the "variable in answer" question type:
Pick numbers
Q=3
so cans/min = 1
R=5
so 45 mins/5gallons = 9 gallons
Now plug Q and R in for each answer choice. The answer that gives you 9 is the correct choice.
E
Pick numbers
Q=3
so cans/min = 1
R=5
so 45 mins/5gallons = 9 gallons
Now plug Q and R in for each answer choice. The answer that gives you 9 is the correct choice.
E
