If the surface area of the cube is 18 sq. cm, what is the surface area of the cuboid made of 3 such cubes?
Answers
If three cubes are joined there will be an increase in length, so height and breadth will be √3 ( by finding a).
So,L=3√3,b=h=√3. T.S.A of cuboid =2×(lb+bh+hl). 2×(3√3+√3×√3+√3×√3)= 20.232 sq cm if simplyfiy it
The surface area of the cuboid made of 3 such cubes is 40.46 sq.cm.
Step-by-step explanation:
Surface area of cube =
Where a is the side of cube
We are given that the surface area of the cube is 18 sq. cm
So,
a=1.7 cm
Cuboid is made of 3 such cubes
Length of cuboid = 1.7+1.7+1.7 = 5.1 cm
Breadth of cuboid = 1.7 cm
Height of cuboid = 1.7 cm
Total surface area of cuboid =
Hence the surface area of the cuboid made of 3 such cubes is 40.46 sq.cm.
#Learn more:
. The base area of a cube is 18 sq. cm. What is the total surface area of the cube
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