If the if the price of …
CBSE, JEE, NEET, CUET
Question Bank, Mock Tests, Exam Papers
NCERT Solutions, Sample Papers, Notes, Videos
Posted by Rishi Raj Singh Jadon 5 years, 11 months ago
- 4 answers
Shourya Singh 5 years, 11 months ago
Yogita Ingle 5 years, 11 months ago
Let the price of one book be y
Let the no. of books purchased be x
So, Total cost = xy
We are given that the total cost is 300
So, xy=300
Now a book is reduced by rupees 5 a person can buy 5 more books
So, the price of one book =y-5
The no. of books purchased =x+5
So, Total Cost = (x+5)(y-5)
Since we are given that the total cost is 300
So, (x+5)(y-5) =300
xy-5x+5y-25=300
300-5x+5y-25=300
-5x+5y=25
-x+y=5
{tex}-\frac{300}{y}+y=5{/tex}
{tex}-\frac{300+y^2}{y}=5{/tex}
{tex}y^2-5y-300=0{/tex}
{tex}y^2-20y+15y-300=0{/tex}
{tex}y(y-20)+15(y-20)=0{/tex}
(y-20)(y+15)=0
y=20,-15
Since Price cannot be negative
So, the original list price of the book is Rs.20
Test
Related Questions
Posted by Dipratna Salunke 1 year, 4 months ago
- 2 answers
Posted by Shree Vanshika Reddy Reddy 3 months ago
- 0 answers
Posted by Shree Vanshika Reddy Reddy 8 months, 2 weeks ago
- 0 answers
Posted by Bhargav Panchal Shantilal Panchal 1 year, 4 months ago
- 2 answers
Posted by Harsha Sarji.S 1 year, 2 months ago
- 0 answers
Posted by Shivanshu Pandey 1 year, 4 months ago
- 0 answers
Posted by Heena Khatun 1 year, 1 month ago
- 0 answers
Posted by Vedika Chourasiya 1 year, 1 month ago
- 0 answers
myCBSEguide
Trusted by 1 Crore+ Students
Test Generator
Create papers online. It's FREE.
CUET Mock Tests
75,000+ questions to practice only on myCBSEguide app
Misha Ahuja 5 years, 11 months ago
0Thank You