समभुज चौकोनाचा एक कर्ण दुसऱ्याच्या 65% असतो. बाजू म्हणून लांब कर्ण वापरून चौरस काढला जातो. समभुज चौकोनाच्या क्षेत्रफळाचे चौरसाचे गुणोत्तर किती असेल?

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  1. 15 ∶ 18
  2. 40 ∶ 13
  3. 13 ∶ 40
  4. 18 ∶ 15

Answer (Detailed Solution Below)

Option 3 : 13 ∶ 40
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RRB NTPC CBT-I Official Paper (Held On: 4 Jan 2021 Shift 1)
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Detailed Solution

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दिले:

समभुज चौकोनाचा एक कर्ण दुसऱ्याच्या ६५% असतो.

बाजू म्हणून लांब कर्ण वापरून चौरस काढला जातो.

वापरलेली संकल्पना:

समभुज चौकोनाचे क्षेत्रफळ = ½(कर्ण उत्पादन)

चौरसाचे क्षेत्रफळ = बाजू x बाजू

गणना:

समभुज चौकोनाचे कर्ण (मोठे) 100 सेमी असू द्या

कर्ण (लहान) कर्ण 65 सेमी (मोठ्या कर्णाच्या 65%) असू द्या

समभुज चौकोनाचे क्षेत्रफळ = ½(100 x 65) = 3250

चौरसाची बाजू = 100 सेमी (मोठ्या कर्णाच्या समान)

चौरसाचे क्षेत्रफळ = (100 x 100) = 10000

प्रमाण,

⇒ समभुज चौकोन : चौरस = 3250 : 10000

⇒ १३ : ४०

∴ योग्य निवड पर्याय 3 आहे.

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