Arrange the following shapes in increasing order of their areas :
A. A circle of diameter 10 cm
B. A rectangle of dimensions [6 cm × 4 cm]
C. A square of side 5 cm
D. An equilateral triangle of side 5 cm
Choose the correct answer from the options given below :निम्नलिखित आकृतियों को उनके क्षेत्रफल के बढ़ते क्रम में व्यवस्थित कीजिए :
A. 10 सेमी व्यास वाला वृत्त
B. [6 सेमी × 4 सेमी] विमाओं वाला आयत
C. 5 सेमी भुजा वाला वर्ग
D. 5 सेमी भुजा वाला समबाहु त्रिभुज
नीचे दिए गए विकल्पों में से सही उत्तर चुनिए :
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Correct answer: D. D, B, C, A
Explanation
Circle: radius = 5 cm, area = πr² = 3.14 × 25 ≈ 78.5 cm² (A). Rectangle: 6 × 4 = 24 cm² (B). Square: 5² = 25 cm² (C). Equilateral triangle: (√3/4) × 5² = 0.433 × 25 ≈ 10.8 cm² (D). In increasing order 10.8 < 24 < 25 < 78.5, that is D, B, C, A.वृत्त: त्रिज्या = 5 सेमी, क्षेत्रफल = πr² = 3.14 × 25 ≈ 78.5 वर्ग सेमी (A)। आयत: 6 × 4 = 24 वर्ग सेमी (B)। वर्ग: 5² = 25 वर्ग सेमी (C)। समबाहु त्रिभुज: (√3/4) × 5² = 0.433 × 25 ≈ 10.8 वर्ग सेमी (D)। बढ़ते क्रम में 10.8 < 24 < 25 < 78.5, अर्थात् D, B, C, A।More Mathematical Reasoning and Aptitude questions
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