Find the length and breath of …
CBSE, JEE, NEET, CUET
Question Bank, Mock Tests, Exam Papers
NCERT Solutions, Sample Papers, Notes, Videos
Posted by Harshit Shinde 5 years, 6 months ago
- 1 answers
Related Questions
Posted by Hemlata Sharma 1 year, 3 months ago
- 0 answers
Posted by Kamaleshwar Kamaleshwar 1 year, 3 months ago
- 1 answers
Posted by Sara Shaikh 1 year, 2 months ago
- 0 answers
Posted by Account Deleted 1 year, 3 months ago
- 1 answers
Posted by Aaradhya Dixit Dixit 1 year, 3 months ago
- 0 answers
Posted by Aaradhya Rai 1 year, 3 months ago
- 1 answers
Posted by Paridhi Chaudhari 5 months, 2 weeks ago
- 3 answers
Posted by Aadrika Rahul 1 year, 3 months ago
- 1 answers
Posted by Gayatri.R Gayatri.R 2 weeks, 5 days ago
- 1 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
Yogita Ingle 5 years, 6 months ago
perimeter of rectangle = 80cm
2(l + b) = 80
l + b = 80/2 = 40
l + b= 40 ..... (i)
and area = 400sq cm
lb = 400
l = 400/b ......... (ii)
Put (ii) in (i) , we get
400/b + b = 40
400 + b2 = 40b
b2 - 40b + 400 = 0
(b- 20 ) (b - 20) = 0
b = 20 cm
But b = 20 in (i) we get
l = 20 cm
1Thank You