iv) 1=21 dm, b = 30 dm, h=15dm
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Answer:
Given that,
lenght=21cm
breadth=30cm
height=15cm
›»Lateral surface area =2h(l+b)
=2×15(21+30)
=30×51
=1530 cm²
›»Total surface area=2[lb+bh+hl]
=2[21×30+30×15+15×21]
=2[630+450+315]
=2×1395
=2790 cm²
›»Volume of cuboid=lbh
=21×30×15
=9450 cm³
hope it works...................................™✌️✌️
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