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Sahay Sir > Question Answers > NCERT Class 8 > Maths > Chapter 13 - Direct and Inverse Proportions > 60. (i) The time taken by a train to cover a fixed distance and the speed of the train. (ii) The distance travelled by CNG bus and the amount of CNG used. (iii) The number of people working and the time to complete a given work.

60. (i) The time taken by a train to cover a fixed distance and the speed of the train. (ii) The distance travelled by CNG bus and the amount of CNG used. (iii) The number of people working and the time to complete a given work.

4. The number of teeth and the age of a person vary