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Q.

Out of a number of saras birds, one-fourth of the number are moving about in lots, Question Image coupled with Question Image coupled with th as well as 7 times the square root of the number move on a hill, 56 birds remain in vakula trees. The total number of birds is ____.


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Detailed Solution

Concept- The total number of birds would be 576. In order to answer this question, we must first assume that there are an infinite number of birds. Then, we must add all of the numbers of Sara's birds that participate in various activities together, since this will equal the total number of birds. Finally, we must solve the resulting equation to determine the total number of birds.
A total number of Saras birds should exist Question ImageNumber of birds moving about in lots is Question ImageNow it is also been given that Question Image of the Saras bird is coupled with Question Image of birds then,
total birds coupled Question ImageAlso it is given that 7 times the square root of the number of birds move on a hill Question Image iii )
There are still several birds in the vakula trees Question ImageNow since we have a total number of Question Image Saras birds, hence we can write the equation by adding (i) , (ii) , (iii) &
(iv) as
Question ImageNow let us assume Question Image, hence we can rewrite the equation as
Question ImageBy further solving this equation we can write
Question ImageQuestion ImageQuestion ImageQuestion ImageSince the aforementioned equation is now in quadratic form, we may factorize the middle term to determine the two roots of the equation.
Question ImageQuestion ImageQuestion ImageQuestion ImageSo we can write
Question ImageNow that we have calculated the number of birds, we will omit because it can never be negative Question Image,
so we can write Question ImageSince we have taken Question Image, where Question Image,
Hence, we can write
=x2=242=576
So, the total numbers of birds Question ImageHence, the correct answer is 576
 
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