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- Data Handling
- Squares and Square Roots
- Cubes and Cube Roots
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NCERT Solutions Class 8 Mathematics Solutions for Exercise 13.1 in Chapter 13 - Direct and Inverse Proportions
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Q2) A mixture of paint is prepared by mixing 1 pan of red pigments with 8 parts of the base. In the following table, find the parts of the base that need to be added.
Solution:
The given mixture of paint is prepared by mixing 1 part of red pigments with 8 parts of the base. For more parts of red pigments, the parts of the base will also be more.
Therefore, the parts of red pigments and the parts of the base are in direct proportion. The given information in the form of a table is as follows.
According to direct proportion,
\frac{^x1}{4}=\frac{8}{1}\Rightarrow^x1=\ 4\ \times8=32
\frac{^x2}{7}=\frac{8}{1}\Rightarrow^x2=\ 7\times8=56
\frac{^x3}{12}=\frac{8}{1}\Rightarrow^x2=8\times12\ =\ 96
\frac{^x4}{20}=\frac{8}{1}\Rightarrow^x4=8\times20=160
The table can be drawn as follows.
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