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  1. Chapter 13 Class 8 Direct and Inverse Proportions
  2. Serial order wise

Transcript

Ex 13.1, 8 Rashmi has a road map with a scale of 1 cm representing 18 km. She drives on a road for 72 km. What would be her distance covered in the map? In map, 1 cm represents 18 km Let x cm represent 72 km. Thus, our table looks like Now, as distance in map increases, the actual distance also increases ∴ Distance on map and Actual Distance are in direct proportion 1/18 = 𝑥/72 72 × 1/18 = 𝑥 4 = 𝑥 𝑥 = 4 cm ∴ Rashmi has covered 4 cm distance in map

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Davneet Singh
Davneet Singh is a graduate from Indian Institute of Technology, Kanpur. He has been teaching from the past 8 years. He provides courses for Maths and Science at Teachoo. You can check his NCERT Solutions from Class 6 to 12.