a school library had 1500books in year 2011 .in 2012 the number of books increased the ratio 1:2. in 2013 the number of books further increased in the ratio 2:5. find the number of books in the year of 2013
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Step-by-step explanation:
1500 books in year 2011
increased to 1:2 in year 2012
increased to 2:5 in year 2013
1a+2a=1500
3a=1500
a=1500/3
a=500
1500+500=2000
in year 2012 books are 2000
2a+5a=2000
7a=2000
a=285.7
2000+285.7=2285.7
in the year 2013 books are 2285.7
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