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  1. Chapter 12 Class 6 Ratio And Proportion
  2. Serial order wise
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Transcript

Ex 12.1, 12 Cost of a dozen pens is Rs 180 and cost of 8 ball pens is Rs 56. Find the ratio of the cost of a pen to the cost of a ball pen. Cost of 12 pens = Rs 180 Cost of 1 pen = Rs 180/12 = Rs 90/6 = Rs 45/3 = Rs 15/1 = Rs 15 Cost of 8 ball pens = Rs 56 Cost of 1 ball pen = Rs 56/8 = Rs 28/4 = Rs 14/2 = Rs 7/1 = Rs 7 Ratio = (πΆπ‘œπ‘ π‘‘ π‘œπ‘“ 𝑝𝑒𝑛)/(πΆπ‘œπ‘ π‘‘ π‘œπ‘“ π‘π‘Žπ‘™π‘™ 𝑝𝑒𝑛) = (𝑅𝑠 15)/(𝑅𝑠 7) = 15/7 ∴ Required ratio is 15 : 7

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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.