Percentage practice question for Railways, SSC. Review the correct answer and explanation, then continue with related practice below.
The length of a rectangle is increased by 20% and its breadth is decreased by 10%. By what percentage must the new area be decreased to restore the original area?
एक आयत की लंबाई में 20% वृद्धि और चौड़ाई में 10% कमी की जाती है।
प्राप्त नए क्षेत्रफल को मूल क्षेत्रफल के बराबर करने के लिए कितने प्रतिशत कम करना होगा?
Answer and explanation are free to read — no sign-in required.उत्तर और व्याख्या पढ़ने के लिए साइन-इन आवश्यक नहीं है।
Correct Answerसही उत्तर
A. 7 11/27% / 7 11/27%
Explanationव्याख्या
New area factor = 1.20 × 0.90 = 1.08.
So new area is 108 when original area is 100.
Required decrease = 8
108 × 100 = 7 11
27%.
108 × 100 = 7 11
नया क्षेत्रफल मूल का 108% है।
108 से 100 पर आने के लिए कमी = 8
27%।
Practice More Like This
Vitorr selects questions using the same topic, subject, exam and overlapping concepts—not just database order.
Related Quizzes
Continue with quizzes connected to Percentage and Math. Sign up is required only when you start a quiz.
Tough Simplification & Basic Percentage Calculations – 50 QuestionsOpen quiz →Average, Percentage, Profit & Loss, Simple Interest, Area & Perimeter – 50 QuestionsOpen quiz →Percentage Practice Set - 30 Bilingual QuestionsOpen quiz →UPSC CSAT 2027 Tough Practice Quiz Set 020 – Advanced DI, Mathematics, Probability & Logical ReasoningOpen quiz →
Related Study Material
Percentage for SSC and Railway Exams: Base Value, Successive Change and Reverse QuestionsRead study article →Percentage Word Problems for SSC & Railway Exams – 100 Bilingual Practice Questions with SolutionsRead study article →Percentage Complete Notes for SSC & Railway SSC एवं Railway के लिए प्रतिशत सम्पूर्ण नोट्सRead study article →