Question

the volume of a cuboid is 840 cm³. if its length is 14 cm and breadth is 5 cm find the height of cuboid​

Answer 1

Answer:

volume of cuboid =l×b×h=448cm

3

=l×b×7=448cm

3

=l×b=64cm

2

but base is square

∴l=b

∴l

2

=64cm

2

⇒l=b=8cm

surface area =2(lb+lh+bh)

=2(8×8+8×7+8×7)

=2(64+56+56)

=352cm

2

Answer 2

→ Given

» Volume of the cuboid = 840 cm³

» Length of the cuboid = 14 cm

» Breadth of the cuboid = 5 cm

→ To find

» Height of the cuboid = ?

→ Formula Used

$\bf\longrightarrow \: volume \: of \: cuboid = \: length \times breadth \times height \:$

→ Solution

Volume of cuboid = length × breadth × height cub.units

★ Height of cuboid = volume / ( length × breadth )

By substituting the given values in the above formula :-

$height = \dfrac{840}{14 \times 5}$

$\therefore\:height\: of\: cuboid \:= \frac{840}{70} = \bf12 cm$

__________________

➻ More information

☛ Volume of cone = 1/ 3 π r² h cubic units.

☛ Volume of cube = a³ where a » sides of cube.

☛Volume of cylinder = πr² h cubic units.