एक समतल में दो समानांतर रेखाएँ AB || CD हैं। बिंदु O उनके बीच इस प्रकार स्थित है कि ∠ABO = 50° और ∠CDO = 30° है। यदि समानांतर दिशा की ओर बने कोण ∠DOB का मान x° है (जहाँ x = ∠ABO + ∠CDO), तो x का मान क्या होगा?

Which Indian independence movement leader was primarily known for his philosophy and practice of non-violent civil disobedience?

Who gave the call for 'Do or Die' during the Quit India Movement in 1942?

Which of the following revolutionary pairs were imprisoned together in Cellular Jail and faced harsh conditions, contributing significantly to the Indian independence movement?