14 In a library the ratio of English books to Math books, is the same as the ratio of Math books to Science book. If there are 1200 books on English and 1800 books on Math, find the number of Science books
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In a library the ratio of English books to Math books, is the same as the ratio of Math books to Science book. If there are 1200 books on English and 1800 books on Math, find the number of Science books
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Ratio of English book to math book = ratio of math book to science book .
Total number of books in English = 1200
Total number of books in Maths = 1800
Number of Science books = ?
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Therefore , E / M = M / S
E = 1200
M = 1800
S = M² / E
S = 1800 × 1800 / 1200
= 900 × 3
= 2700
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No of Science books = 2700
Some formula of Ratio and Proportional :
- a:b⇒a/ b
- a:b::c:d⇒ab = cd
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Number of science books is 2700
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