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Ex 12.1, 12 - Cost of a dozen pens is Rs 180 and cost of 8 ball pens

Ex 12.1, 12 - Chapter 12 Class 6 Ratio And Proportion - Part 2

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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 has done his B.Tech from Indian Institute of Technology, Kanpur. He has been teaching from the past 13 years. He provides courses for Maths, Science, Social Science, Physics, Chemistry, Computer Science at Teachoo.