Area and Perimeter practice question for Railways, SSC. Review the correct answer and explanation, then continue with related practice below.
The length and breadth of a rectangle are increased by 20% and 25% respectively. If the new area is 1800 cm², find the original area.
एक आयत की लंबाई और चौड़ाई में क्रमशः 20% और 25% की वृद्धि की जाती है।
यदि नया क्षेत्रफल 1800 cm² है, तो मूल क्षेत्रफल ज्ञात कीजिए।
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
C. 1200 cm²C. 1200 सेमी²
Explanationव्याख्या
New area factor = 1.20 × 1.25 = 1.5.
Original area = 1800 ÷ 1.5 = 1200 cm².
नया क्षेत्रफल गुणक = 1.20 × 1.25 = 1.5।
मूल क्षेत्रफल = 1800 ÷ 1.5 = 1200 सेमी²। ---
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