HOW TO CRACK NDA IN 90 DAYS

LIMITS SHORTCUT | IMPORTANT FOR BOARDS, NDA and NA Exam

IIT JEE SHORT TRICK || How To Find Rank of Word - SHORTCUT || IITJEE, BITSAT, NDA,CET

How To Clear NDA Written Exam in 20 Days | NDA -1 2019 | How To Crack NDA Exam | NDA 2019 Exam Tips

How To Get 90% in 15 days in Class 12 Boards | How To Score 90% in 15 Days #90%

NEET 2020 - How To Prepare For The Exam In 70 Days | Strategy To Crack The Exam | Important Tips

How To Crack JEE Mains 2019 in 30 Days with180+ Marks || Final Revision Tips For JEE Mains

How To Crack JEE Mains 2019 in 30 Days with180+ Marks || Final Revision Tips For JEE Mains

The half life period of a radioactive element is 10 days. Then how long does it take for 90% of a given mass of this elements to disintegrate -A) 19 days B) 27 days C) 33 days -D) 47 days