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यदि सरल लोलक की लम्बाई 4 गुना बढ़ा दी जाए , तो उसके दोलन का आवर्तकाल . . . . - If the length of the simple pendulum is increased by 4 times, then the time period of its oscillation is . , , , - Yadi Saral Lolak Ki Lambai 4 Guna Badha Dee Jaye , To Uske Dolan Ka Awartkaal . . . . General Science in hindi,  Physics 4 Guna Badh Jayega question answers in hindi pdf  ghatkar Prarambhik Maan Ka Adha Ho Jayega questions in hindi, Know About 4 Guna Ghat Jayega General Science online test General Science notes in hindi quiz book    Iske Prarambhik Maan Se 2 Ke gunak Se Badh Jayega