Area and Perimeter practice question for Railways, SSC. Review the correct answer and explanation, then continue with related practice below.
The perimeter of a rectangle is 120 cm. Its length is twice its breadth. Find its area.
एक आयत का परिमाप 120 cm है।
उसकी लंबाई उसकी चौड़ाई की दोगुनी है।
उसका 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. 800 cm²C. 800 सेमी²
Explanationव्याख्या
Let breadth = x and length = 2x.
Then 2(2x + x) = 120 ⇒ 6x = 120 ⇒ x = 20 cm.
Length = 40 cm.
Area = 40 × 20 = 800 cm².
मान लें चौड़ाई = x तथा लंबाई = 2x।
तब 2(2x + x) = 120 ⇒ x = 20 सेमी।
लंबाई = 40 सेमी।
क्षेत्रफल = 40 × 20 = 800 सेमी²। ---
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