For a 20% decrease in the radius of a circle, what will be the percentage reduction in its area?

গণিত শতকরা হ্রাস-বৃদ্ধি Bangladesh Navy — Upper Division Assistant LGD SAE (Civil) - 2026 BSCIC Technical Officer - 2026 Bangladesh Navy — Upper Division Assistant - 2026 BB Officer (General) - 2019 ECS – Upper Division Assistant - 2018 BB Officer (General) - 2018 Pre-Primary Teacher - 2014 SJIBL MTO - 2011 Rupali Senior Officer - 2010 Dhaka Bank MTO - 2004 SIBL Officer - 2004 DOR Sub-Registrar - 2003 Premier Senior Officer - 2003

গণিত শতকরা হ্রাস-বৃদ্ধি GTCL Technician BR Train Examiner - 2026 Combined Bank Officer - 2026 PMG Khulna Postal Operator/Mail Operator/Technician - 2026 BJSC Bench Assistant - 2026 BR Guard Grade-II - 2026 47th BCS Preli - 2025 CS Cox’s Bazar Statistician - 2025 BEZA – Steno / UDA - 2024 Dhaka WASA – Sub-Assistant Engineer - 2024 Cabinet Division Office Assistant-cum-Computer Typist - 2023 PMG Northern Region – Postal Operator - 2023 DOC – Assistant Inspector - 2023 LGED – Accounts Assistant - 2023 GTCL Technician - 2023 Directorate of Posts Various Post - 2022 CAAB – Various Posts - 2021 ACC – Assistant Director - 2020 PSB Officer - 2018 Exim Bank TAO - 2018 Primary Education Officer - 2016 Sonali Officer - 2016 DoE Assistant Director - 2011 BKB Officer (Cash) - 2010 Uttara Officer (Cash) - 2008 Govt Secondary Teacher - 2008 Govt Secondary Teacher - 2006 MoFDM – Project Implementation Officer - 2004 DXP Assistant Inspector of Explosives - 2003 Govt Secondary Teacher - 2001

গণিত শতকরা হ্রাস-বৃদ্ধি শতকরা (Percentage) MoTJ Assistant Director WZPDCL JAM (Accounts/Finance) - 2026 MoTJ Assistant Director - 2026 Combined Bank Officer - 2023 PMG Northern Circle Postman - 2022 BKB Officer - 2017 Modhumoti PO - 2017 BB AD - 2016 Pubali Junior Officer - 2012 BB AD - 2011 Pubali Junior Officer - 2011 ONE PO - 2010 BB AD - 2009 Karmasangsthan Senior Officer - 2009 BKB Assistant Officer - 2007 BCBL Officer - 2006

গণিত শতকরা হ্রাস-বৃদ্ধি APSCL Junior Electrician

গণিত শতকরা হ্রাস-বৃদ্ধি APSCL Junior Electrician BPSC Fisheries Survey Officer - 2026 BAEC Sub-Assistant Engineer - 2026 APSCL Junior Electrician - 2026 Grameen Officer - 2025 ECS – OA Cum Computer Operator - 2025 CS Office Kushtia – Health Assistant - 2025 Bank Asia Officer - 2025 DGFI Security Inspector (SI) - 2025 Janata Officer - 2024 45th BCS Preli - 2023 PPA – Office Sohayok - 2023 PPA – SAE (Civil) - 2023 LGED – Community Organizer - 2023 CAAB – ATM/Aerodrome Officer/CNS Engineer - 2023 BPDB – Security Guard - 2023 41st BCS Preli - 2021 DTE – Accountant - 2021 NSI – Computer Operator - 2021 Uttara Officer - 2021 CAAB – Various Posts - 2021 CAAB – Security Officer - 2021 IBBL Officer - 2021 BADC – Assistant Administrative Officer - 2020 Primary Assistant Teacher - 2019 IBBL Officer - 2019 Sonali Officer - 2018 Southeast Officer - 2018 BKB IT - 2016 BB Officer - 2015 RAKUB Senior Officer - 2015 MoE, MoRTB, MoHPW SAE (Civil) - 2015 Pre-Primary Teacher - 2013 DG Food – Office Assistant cum Computer Typist - 2013 BPDB Office Assistant - 2012 NCC Officer - 2011 BKB Data Entry Operator - 2010 DSS Social Service Officer - 2010 Primary Head Teacher - 2009 DIP Assistant Director - 2007 27th BCS Preli - 2005 BMET Assistant Director - 2001

গণিত শতকরা হ্রাস-বৃদ্ধি Bangladesh Navy Storeman