Question

iv) 1=21 dm, b = 30 dm, h=15dm​

Answer 1

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...................................™✌️✌️