Question

Q. 58 Cubic blocks having side 1 cm are made from a wooden cube having 4 cm side. What is the total surface arca of a cuboid having breadth and height 2 cm. each made from all small blocks? (1) 136 cm (2) 112 cm (3) 96 cm (4) 72 cni? Y1​

Answer 1

Answer:

Q. 58 Cubic blocks having side 1 cm are made from a wooden cube having 4 cm side. What is the total surface arca of a cuboid having breadth and height 2 cm. each made from all small blocks? (1) 136 cm (2) 112 cm (3) 96 cm (4) 72 cni? Y1

Answer 2

Answer:

Number of cubes =

Volumeofcube

Volumeofcuboid

=

1×1×1

8×4×2

=64

Surface area of cuboid =2×(8×4+4×2+2×8)cm

2

=2×(32+8+16)cm

2

=112cm

2

Surface area of 64 cubes =64×6cm

2

=384cm

2

∴ Required ratio =

384

112

=

24

7

=7:24