Question

11. A cuboid, made of wood is 2.5m long, 2m wide and 1.5 m high. Find the area of
wood used in making the cuboid. Also find the length of the aluminium joints to
be used for all 12 edges.
​

Answer 1

Answer:

7.5 wood and 23.5 aluminum

Step-by-step explanation:

C u b o i d ( 1 )   v o l u m e : V = a b c ( 2 )  

s u r f a c e   a r e a : S = 2 ( a b + b c + c a )

Answer 2

The area is 23.5 sq. m and length of aluminium is 24 m.

Step-by-step explanation:

Since we have given that

Length of cuboid = 2.5 m

Width of cuboid = 2 m

Height of cuboid = 1.5 m

So, Area of wood used in making the cuboid is given by

$2\times (lb+bh+lh)\\\\=2\times (2.5\times 2+2\times 1.5+2.5\times 1.5)\\\\=2\times (5+3+3.75)\\\\=2\times 11.75\\\\=23.5\ m^2$

The length of the aluminium joints to be used for all 12 edges is given by

$4\times (l+b+h)\\\\=4\times (2.5+2+1.5)\\\\=24\ m$

Hence, the area is 23.5 sq. m and length of aluminium is 24 m.

# learn more:

A CUBOID MADE OF WOOD IS 1M 25 CM LONG, 1 M WIDE AND 75 CM HIGH. FIND THE AREA OF WOOD USED IN MAKING THE CUBOID. ALSO FIND THE LENGTH OF IRON JOINTS TO BE USED FOR ALL 12 EDGES.

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