![Example 1 - Chapter 13 Class 8 Direct and Inverse Proportions - Part 2](https://d1avenlh0i1xmr.cloudfront.net/cbafd4fd-1017-41f1-8212-0be0117e3342/slide2.jpg)
![Example 1 - Chapter 13 Class 8 Direct and Inverse Proportions - Part 3](https://d1avenlh0i1xmr.cloudfront.net/782fcd17-9363-4529-878d-756d57292d98/slide3.jpg)
![Example 1 - Chapter 13 Class 8 Direct and Inverse Proportions - Part 4](https://d1avenlh0i1xmr.cloudfront.net/8d50d8d1-fadb-44b6-b349-91925444e693/slide4.jpg)
![Example 1 - Chapter 13 Class 8 Direct and Inverse Proportions - Part 5](https://d1avenlh0i1xmr.cloudfront.net/96fc562c-f83c-4793-87e8-f4418f4bdbc7/slide5.jpg)
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Last updated at April 16, 2024 by Teachoo
Example 1 The cost of 5 metres of a particular quality of cloth is Rs 210. Tabulate the cost of 2, 4, 10 and 13 metres of cloth of the same type. Given cost of 5 metres of cloth = ₹ 210 We need to find cost of 2, 4, 10, 13 meters of cloth Let’s draw a table Finding cost of 2 meters of cloth Let the Cost of cloth = Rs y As quantity of cloth increases, its cost also increases. ∴ Quantity and cost are in direct proportion. 5/210 = 2/𝑦 𝑦 × 5 = 2 × 210 𝑦 × 5 = 420 𝑦 = 420/5 = 84 ∴ Cost of 2 metres of cloth = Rs 84 Finding cost of 4 meters of cloth Let the Cost of cloth = Rs y Since Quantity and cost are in direct proportion. 5/210 = 4/𝑦 𝑦 × 5 = 4 × 210 𝑦 × 5 = 840 𝑦 = 840/5 𝑦 = 168 ∴ Cost of 4 metres of cloth = Rs 168 Finding cost of 10 meters of cloth Let the Cost of cloth = Rs y Since Quantity and cost are in direct proportion. 5/210 = 10/𝑦 𝑦 × 5 = 10 × 210 𝑦 × 5 = 2100 𝑦 = 2100/5 𝑦 = 420 ∴ Cost of 10 metres of cloth = Rs 420 Finding cost of 13 meters of cloth Let the Cost of cloth = Rs y Since Quantity and cost are in direct proportion. 5/210 = 13/𝑦 𝑦 × 5 = 13 × 210 𝑦 = (13 × 210)/5 𝑦 = 13 × 42 y = 546 ∴ Cost of 13 metres of cloth = Rs 546 Thus, our table looks like