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A bar tender replaces some quantity of alcohol having 40% concentration with water and thus the concentration of alcohol changes to 30%. If the alcohol which he replaced is mixed with another sample of 260 ml alcohol having 20% concentration, then a mixture having 27% concentration of alcohol is prepared. Find the initial quantity of alcohol having 40% concentration.
The given bar graph represents data of the production of paper (in ten lakh tonnes) by three different companies X, Y and Z during the years 2008 to 2012. The x-axis shows the 'years' and the y-axis represents the 'production of paper (ten lakh tonnes)'. (Note: The data shown is only for mathematical exercise. They do not represent actual figures.)  The total production of Company Y during 2008 and 2009 and Company X for 2011 and 2012 taken together is p% (p is correct to the nearest integer) more than the total production of Company Z during 2010, 2011 and 2012. The total production of Company Z during 2008 and 2009 taken together is q% (q is correct to the nearest integer) less than the total production of Company X during 2008, 2009 and 2012 and Company Y during 2010 and 2011 all together.  What is the positive difference between p and q ? 
With reference to the usefulness of the by-products of sugar industry, Which of the following statements is/are correct 1. Bagasse can be used as biomass fuel for the generation of energy. 2. Molasses can be used as one of the feedstocks for the production of synthetic chemical fertilizers. 3. Molasses can be used for the production of ethanol. Select the correct answer using the codes given below:
A diluted alcohol contains 16L of alcohol and rest is water. A new mixture in which the concentration of alcohol is 30% is to be prepared by replacing diluted alcohol. How many litres of the mixture shall be replaced with pure alcohol if there was initially 64L of water in the mixture.
Which of the following statements is incorrect regarding preparation of alcohols? give primary alcohol and secondary alcohol respectively b) Ketones on reaction with Grignard’s reagent gives tertiary alcohol c) Aldehydes on reaction with Grignard’s reagent gives primary or secondary alcohol d) Alkyl halides on reaction alcoholic potash gives alcohol
Two cans of equal volume contains mixture of alcohol and water. In first can, the ratio between the alcohol and water is 3 ∶ 7 and in second can, the ratio between the alcohol and water is 2 ∶ 3. When two cans mixed together, find the ratio of alcohol and water in mixture.
When a 30% concentration of alcohol is mixed with an 80% concentration of alcohol we get a mixture of 50% concentration of alcohol. In what ratio were these two different concentrations of alcohol mixed?
When 1-liter alcohol is added to the 20-liter mixture of alcohol and water, the quantity of alcohol becomes 50% less than that of water in the mixture. Find the initial ratio of alcohol and water in the mixture?
The question below consists of a set of labelled sentences. These sentences, when properly sequenced form a coherent paragraph. Select the most logical order of sentences from among the options. P: We may see alcohol and tobacco advertisements everywhere, on television, in newspaper, on street ads card etc. Q: But we know the truth is alcohol and cigarette are harmful for people’s health and sometimes it may bring bad effects to self-impression. R: Alcohol ads usually create several feints to tell people that alcohol is good for people and induce people to drink. S: On the other hand, the malign influence of advertisements shows smoking as something "cool".
When 8 litres of water and 2 litres of alcohol are added to 10 litres of alcohol- water mixture, the ratio of alcohol and water in the mixture becomes 3 ∶ 7. Find the ratio of alcohol and water in the initial mixture.