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Q11. The present population of a city is 20,000. The ratio of female to
male is given as 3: 7. If population of female increases by 20% per year
and population of male increases by 40% per year then find the ratio of
male to female after two years in the city ?
Answers
Answered by
0
Let the population before two years ago be x
Given the population increases by 10%
So increase in population after one year is
100
10
×x=0.1x
So population after one year is x+0.1x=1.1x
Increase in population after another one year is
100
10
×1.1x=0.11x
So population at present is 1.1x+0.11x=1.21x
But given population at present is 3,02,500
⟹1.21x=302500
⟹x=
1.21
302500
=2,50,000
Population of city two years ago is 2,50,000
Answered by
0
Answer:
108:343
Step-by-step explanation:
after all calculation
3*3*18 : 7*7*7
which gives
108:343
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