Difference between revisions of "JACB - 8 - Maths :: Direct and Inverse Proportion"

https://s3.ap-south-1.amazonaws.com/prod.evidyaloka.org/couse_documents/Textbook+Links/JACB/2021+Edition/Math/T+3085_8M.pdf (Hindi Medium)

[Author - Rishi Mazumdar]

https://hi.khanacademy.org/math/in-math-by-grade/in-eighth-grade-math/direct-inverse-proportions (Khan Academy)

[Author - Kripa S]

https://encrypted-tbn0.gstatic.com/images?q=tbn:ANd9GcTHyX4m1veFeiPuZymoJGrmR8_G1Hi8qZKBzfUE66geuwYD0ry0 (proportion example 1)

https://image.pbs.org/poster_images/assets/PROPORTION.jpg.resize.710x399.jpg (proportion example 2)

https://www.mathsisfun.com/algebra/images/proportion-1a.gif (proportion with numbers)

https://www.mathsisfun.com/algebra/images/proportion-inverse-square.svg (inverse proportion)

[Author - Kripa S]

1. One pen costs 5 rs. How much with 10 pens cost? Is this direct proportion or inverse proportion? Why?

2. In 1 day, my sister reads 20 pages of a book. In how many days can she finish a book of 200 pages? If my sister reads 25 pages in a day, in how many days can she finish the book? Is this direct proportion or inverse proportion? Why?

[Contributor - Ashish Gaurav]

https://drive.google.com/open?id=1qJWvi-mYfVPYlAa1O1o7ukkpfl4TuKYu (Question Bank - English)