A towel, when bleached, was found to have lost 20% of its length and 10% of its breadth. What is the percentage of decrease in area? (একটি তোয়ালে ব্লিচ করার পর দেখা গেল যে এটির দৈর্ঘ্য ২০% এবং প্রস্থ ১০% হ্রাস পেয়েছে। ক্ষেত্রফল শতকরা কত শতাংশ হ্রাস পেয়েছে?)

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

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

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

BUET APSCL Junior Electrician গণিত শতকরা হ্রাস-বৃদ্ধি

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

PSC Bangladesh Navy Storeman গণিত শতকরা হ্রাস-বৃদ্ধি