Question

The ratio of maths and science books in a school library is 4:5. If the number of science books is 75, find the number of maths books. ​

Answer 1

Answer:

60

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Answer 2

Question:–

The ratio of maths and science books in a school library is 4:5. If the number of science books is 75, find the number of maths books.

To Find:–

• Number of maths books

Solution:–

• Ratio of maths books to science books = 4:5
• Number of science books = 75

Let,

• Number of science books = 5x
• Number of maths books = 4x

$\longmapsto{ \sf \: \: \: \: 5x = 75}$

$\longmapsto{ \sf \: \: \: \: x = \frac{75}{5} = 15}$

Now,

$\longmapsto{ \sf \: \: \: number \: of \: maths \: books = 4 \times 15}$

$\longmapsto{ \sf \: \: \: number \: of \: maths \: books = 60}$

Hence,

• The total maths books are 60.