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07 Feb 2014, 03:26
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84% (01:44) correct
16%
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What strength of 20 ml alcohol should be added to 10ml of 50% alcohol to get an average strength of 20% alcohol.
A. 0.5 %
B. 5 %
C. 50 %
D. 5.5 %
E. 0.05 %
A. 0.5 %
B. 5 %
C. 50 %
D. 5.5 %
E. 0.05 %
13 Apr 2021, 03:03
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Bunuel
What strength of 20 ml alcohol should be added to 10ml of 50% alcohol to get an average strength of 20% alcohol.
A. 0.5 %
B. 5 %
C. 50 %
D. 5.5 %
E. 0.05 %
A. 0.5 %
B. 5 %
C. 50 %
D. 5.5 %
E. 0.05 %
\(20*x + 10*0.5 = (20 + 10)*0.2\)
\(x = 0.05 = 5%.\)
Answer: B.
General Discussion
04 Mar 2014, 02:17
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Let the strength be x
Then
20.x/100 + 10.50/100 = 30.20/100
x = 5 % = Answer =B
Then
20.x/100 + 10.50/100 = 30.20/100
x = 5 % = Answer =B
