Answer
Verified
476.7k+ views
Hint: Initially take the volume of the jar as 100 ml and let’s denote whisky containing 40% alcohol as \[whisk{y_1}\] and whisky containing 19% of alcohol as \[whisk{y_2}\] .
Complete step-by-step answer:
Initially the jar contains 100ml of \[whisk{y_1}\]. Given k ml of \[whisk{y_1}\] is replaced by \[whisk{y_2}\].
Let's take the jar of 100ml.
Initial condition: Jar contains 100 ml of whisky (containing 40% of alcohol) \[ \Rightarrow \] 40ml of alcohol is present in 100 ml of mixture .
Now k ml of\[whisk{y_1}\]k ml of\[whisk{y_2}\].
Final condition: Jar contains 100 ml of new whisky which is mixture of (100-k)ml \[whisk{y_1}\] and k ml of \[whisk{y_2}\] and it is given 26% of alcohol is present in new whisky in the jar.
Therefore , the total amount of alcohol present in new whisky is the amount of alcohol in \[whisk{y_1}\] and amount of alcohol in \[whisk{y_2}\] .
I.e, Total amount of alcohol present in new whisky = amount of alcohol in \[whisk{y_1}\] + amount of alcohol in \[whisk{y_2}\] \[....\left( 1 \right)\]
Amount of alcohol in \[whisk{y_1}\]:
Amount of \[whisk{y_1}\]present in new whisky is (100-k) ml, given that \[whisk{y_1}\] contains 40% of alcohol.
Therefore, amount of alcohol in \[whisk{y_1}\]=
(amount of \[whisk{y_1}\])(percentage of alcohol in \[whisk{y_1}\] ) \[\dfrac{1}{{100}}\]\[ = \left( {100 - k} \right)\left( {\dfrac{{40}}{{100}}} \right)......\left( 2 \right)\]
Amount of alcohol in \[whisk{y_2}\]:
Amount of \[whisk{y_2}\]present in new whisky is k ml, given \[whisk{y_2}\]contains 19% alcohol.
Therefore, amount of alcohol in \[whisk{y_2}\]=
(amount of \[whisk{y_2}\])(percentage of alcohol in \[whisk{y_2}\] ) \[\dfrac{1}{{100}}\]\[ = \left( k \right)\left( {\dfrac{{19}}{{100}}} \right)......\left( 3 \right)\]
Given that 26% of alcohol is contained in the final mixture.
\[ \Rightarrow \]26 ml of alcohol in 100 ml of the new whisky. \[....\left( 4 \right)\]
substitute equation 2 , 3, 4 in the equation 1.
\[26 = \left( {100 - k} \right)\left( {\dfrac{{40}}{{100}}} \right) + \left( k \right)\left( {\dfrac{{19}}{{100}}} \right)\]
\[26 = \dfrac{{\left( {4000 - 40x + 19k} \right)}}{{100}}\]
\[2600 = 4000 - 21k\]
\[ \Rightarrow 21x = 1400\]
\[ \Rightarrow 3k = 200\]
Hence, the value of 3k= 200.
\[ \Rightarrow 3k = 200\]
Note: We can take the jar of any volume according to our interest . Here 100 is taken for the convenience of reducing the calculation part and giving less scope to the calculation errors.
Students can take the volume of the jar as a variable and solve the question it does not disturb or interrupt the final answer
Complete step-by-step answer:
Initially the jar contains 100ml of \[whisk{y_1}\]. Given k ml of \[whisk{y_1}\] is replaced by \[whisk{y_2}\].
Let's take the jar of 100ml.
Initial condition: Jar contains 100 ml of whisky (containing 40% of alcohol) \[ \Rightarrow \] 40ml of alcohol is present in 100 ml of mixture .
Now k ml of\[whisk{y_1}\]k ml of\[whisk{y_2}\].
Final condition: Jar contains 100 ml of new whisky which is mixture of (100-k)ml \[whisk{y_1}\] and k ml of \[whisk{y_2}\] and it is given 26% of alcohol is present in new whisky in the jar.
Therefore , the total amount of alcohol present in new whisky is the amount of alcohol in \[whisk{y_1}\] and amount of alcohol in \[whisk{y_2}\] .
I.e, Total amount of alcohol present in new whisky = amount of alcohol in \[whisk{y_1}\] + amount of alcohol in \[whisk{y_2}\] \[....\left( 1 \right)\]
Amount of alcohol in \[whisk{y_1}\]:
Amount of \[whisk{y_1}\]present in new whisky is (100-k) ml, given that \[whisk{y_1}\] contains 40% of alcohol.
Therefore, amount of alcohol in \[whisk{y_1}\]=
(amount of \[whisk{y_1}\])(percentage of alcohol in \[whisk{y_1}\] ) \[\dfrac{1}{{100}}\]\[ = \left( {100 - k} \right)\left( {\dfrac{{40}}{{100}}} \right)......\left( 2 \right)\]
Amount of alcohol in \[whisk{y_2}\]:
Amount of \[whisk{y_2}\]present in new whisky is k ml, given \[whisk{y_2}\]contains 19% alcohol.
Therefore, amount of alcohol in \[whisk{y_2}\]=
(amount of \[whisk{y_2}\])(percentage of alcohol in \[whisk{y_2}\] ) \[\dfrac{1}{{100}}\]\[ = \left( k \right)\left( {\dfrac{{19}}{{100}}} \right)......\left( 3 \right)\]
Given that 26% of alcohol is contained in the final mixture.
\[ \Rightarrow \]26 ml of alcohol in 100 ml of the new whisky. \[....\left( 4 \right)\]
substitute equation 2 , 3, 4 in the equation 1.
\[26 = \left( {100 - k} \right)\left( {\dfrac{{40}}{{100}}} \right) + \left( k \right)\left( {\dfrac{{19}}{{100}}} \right)\]
\[26 = \dfrac{{\left( {4000 - 40x + 19k} \right)}}{{100}}\]
\[2600 = 4000 - 21k\]
\[ \Rightarrow 21x = 1400\]
\[ \Rightarrow 3k = 200\]
Hence, the value of 3k= 200.
\[ \Rightarrow 3k = 200\]
Note: We can take the jar of any volume according to our interest . Here 100 is taken for the convenience of reducing the calculation part and giving less scope to the calculation errors.
Students can take the volume of the jar as a variable and solve the question it does not disturb or interrupt the final answer
Recently Updated Pages
Who among the following was the religious guru of class 7 social science CBSE
what is the correct chronological order of the following class 10 social science CBSE
Which of the following was not the actual cause for class 10 social science CBSE
Which of the following statements is not correct A class 10 social science CBSE
Which of the following leaders was not present in the class 10 social science CBSE
Garampani Sanctuary is located at A Diphu Assam B Gangtok class 10 social science CBSE
Trending doubts
A rainbow has circular shape because A The earth is class 11 physics CBSE
Which are the Top 10 Largest Countries of the World?
Fill the blanks with the suitable prepositions 1 The class 9 english CBSE
The Equation xxx + 2 is Satisfied when x is Equal to Class 10 Maths
How do you graph the function fx 4x class 9 maths CBSE
Give 10 examples for herbs , shrubs , climbers , creepers
Who gave the slogan Jai Hind ALal Bahadur Shastri BJawaharlal class 11 social science CBSE
Difference between Prokaryotic cell and Eukaryotic class 11 biology CBSE
Why is there a time difference of about 5 hours between class 10 social science CBSE