# Ex 12.1, 12 - Chapter 12 Class 6 Ratio and Proportion

Last updated at April 16, 2024 by Teachoo

Last updated at April 16, 2024 by Teachoo

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 = (πΆππ π‘ ππ πππ)/(πΆππ π‘ ππ ππππ πππ) = (π π 15)/(π π 7) = 15/7 β΄ Required ratio is 15 : 7