Book: NCERT - Mathematics
Chapter: 13. Direct and Inverse Proportions
Subject: Maths - Class 8th
Q. No. 4 of Exercises 13.1
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4
A machine in a soft drink factory fills 840 bottles in six hours. How many bottles will it fill in five hours?
The given information in the form of table is as follows:
bottles | 840 | x |
hours | 6 | 5 |
Let x be the no of bottles filled in 5 hours.
The no of bottles and no of hours are in direct proportion.
Therefore,
840/6 = x/5
→x = 700
Thus, 700 bottles will be filled in 5 hours.
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Chapter Exercises
More Exercise Questions
2
A mixture of paint is prepared by mixing 1 part of red pigments with 8 parts of base. In the following table, find the parts of base that need to be added.
Parts of Red Pigment | 1 | 4 | 7 | 12 | 20 |
Parts of base | 8 |