Area and Perimeter practice question for Railways, SSC. Review the correct answer and explanation, then continue with related practice below.
The area of a rectangle is 2400 cm². If its length is increased by 10 cm and breadth is decreased by 5 cm, its area remains unchanged. If its original breadth is 30 cm, find its original perimeter.
एक आयत का क्षेत्रफल 2400 cm² है।
यदि उसकी लंबाई 10 cm बढ़ा दी जाए और चौड़ाई 5 cm घटा दी जाए, तो उसका क्षेत्रफल अपरिवर्तित रहता है।
यदि उसकी मूल चौड़ाई 30 cm है, तो उसका मूल परिमाप 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. 220 cmC. 220 सेमी
Explanationव्याख्या
Original length = 2400
30 = 80 cm.
Original perimeter = 2(80 + 30) = 220 cm.
मूल लंबाई = 2400
30 = 80 cm।
मूल परिमाप = 2(80 + 30) = 220 cm। ---
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