NCERT Solutions for Class 7th Maths Chapter 11 Perimeter and Area Exercise 11.1
Exercise 11.1
https://www.cbselabs.com/rd-sharma-class-7-solutions/
https://www.cbselabs.com/ncert-solutions-for-class-7-maths/
https://www.cbselabs.com/ncert-solutions-for-class-7-science/