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एक घन की भुजा 2 .5 मीटर है इसका पृष्ठीय क्षेत्रफल तथा आयतन उचित सार्थक अंको में ज्ञात कीजिये ।

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भुजा की लम्बाई ` L= 2.5 ` मीटर ( सार्थक अंक =2)
पृष्ठीय क्षेत्रफल ` = 6L ^(2) = 6 xx2.5xx2.5 = 37.50` मीटर`"" ^(2)`
`=38` मीटर `""^(2)` ( दो सार्थक अंक तक )
आयतन `= L^(3 ) = 2.5 xx2.5 xx2.5 ` मीटर`""^(3 )= 15.625`मीटर `""^(3 )`
`= 16 ` मीटर `""^(3) ` ( दो सार्थक अंक तक )

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