प्रत्येकी 7 सेमी बाजूच्या चौकोनी पत्र्याच्या प्रत्येक कोपऱ्यातून 0.25 चौरस सेमी क्षेत्रफळाचे चौरस कापले जातात आणि उर्वरित पत्रा कापलेल्या बाजूने दुमडून घन बनतो. या खुल्या ऊर्ध्व घनाचे घनफळ____ सेमी3 असेल.

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RRC Group D Previous Paper 11 (Held On: 3 Oct 2018 Shift 1)
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  1. 21
  2. 16
  3. 18
  4. 20

Answer (Detailed Solution Below)

Option 3 : 18
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RRB Group D Full Test 1
100 Qs. 100 Marks 90 Mins

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चौरसाची बाजू = 7 सेमी

पत्र्यामधून कापलेल्या प्रत्येक लहान चौरसाचे क्षेत्रफळ = 0.25

पत्र्यामधून कापलेल्या प्रत्येक लहान चौरसाची बाजू = √0.25 = √(0.5 × 0.5) = 0.5 सेमी

जर उरलेला पत्रा कापलेल्या बाजूने दुमडला तर घन तयार होईल

घनाची लांबी = 6 सेमी

घनाची रुंदी = 6 सेमी

घनाची उंची = 0.5 सेमी

आपल्याला माहीत आहे की, घनाचे घनफळ = लांबी × रुंदी × उंची 

घनाचे घनफळ = 6 × 6 × 0.5 = 18 सेमी3

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