किसी घनाभ की क्रमागत भुजाऐं `1cm` तथा `2cm` हैं तथा सम्पूर्ण पृष्ठ क्षेत्रफल `22 cm^(2)` है। घनाभ का विकर्ण ज्ञात करें?A. `sqrt(10)`cmB. `2sqrt(3)` cmC. `sqrt(14)` cmD. `4cm`

किसी घनाभ की क्रमागत भुजाऐ

1.	किसी घनाभ की क्रमागत भुजाऐं `1cm` तथा `2cm` हैं तथा सम्पूर्ण पृष्ठ क्षेत्रफल `22 cm^(2)` है। घनाभ का विकर्ण ज्ञात करें?A. `sqrt(10)`cmB. `2sqrt(3)` cmC. `sqrt(14)` cmD. `4cm`
Answer» Correct Answer - C Let the length `=1cm` breadth `=2cm` height `=hcm` `2(lb+bh+hl)=22` `2(2+2h+h)=22` `2+3h=11` `3h=9` `h=3cm` `D=sqrt(1^(2)+2^(2)+3^(2))=sqrt(1+4+9)` `=sqrt(14)cm`

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