Rs 6500 were divided equally among a certain number of person had there been 15 more persons each would have got rupees 30 less. find the original number of person.
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Answered by
490
Let number of persons be n.
Share of each person = 6500/n ------------ (i)
There been 15 persons = 6500/n+15 ---------- (ii)
Solving (i) and(ii) we get
= 6500/n - 6500/n+15 = 30
= 6500*15/n^2 + 15n = 30
= 6500*15/30 = n * n +15n
= 3250=n * n +15n
= n^2 + 15n-3250 = 0
= (n+65)(n-50) = 0
n=-65, n=50
Since n cannot be negative. n = 50
Hope this helps!
Share of each person = 6500/n ------------ (i)
There been 15 persons = 6500/n+15 ---------- (ii)
Solving (i) and(ii) we get
= 6500/n - 6500/n+15 = 30
= 6500*15/n^2 + 15n = 30
= 6500*15/30 = n * n +15n
= 3250=n * n +15n
= n^2 + 15n-3250 = 0
= (n+65)(n-50) = 0
n=-65, n=50
Since n cannot be negative. n = 50
Hope this helps!
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142
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