Send the following on WhatsApp
Continue to ChatNCERT Question 22 - Chapter 12 Class 9 - Sound https://teachoo.com//10407/3069/NCERT-Question-22/category/NCERT-Questions/
NCERT Question 22 - Chapter 12 Class 9 - Sound https://teachoo.com//10407/3069/NCERT-Question-22/category/NCERT-Questions/