Question

work out surface area of cuboid ​

Answer 1

Answer:

so the answer ,hope it helps

Answer 2

Answer :-

Given:

• Height of cuboid = 1.2 cm

• Shape of end face of cuboid = Square

• Volume of cuboid = 5760 mm³

To find:

• Surface Area of the cube.

Required Formulae:

• Volume of cuboid = l×b×h

• Surface Area of cuboid = 2(lb+bh+hl)

• Here, l = length, b = breadth, h = height

How to find ?

• The end face of the cuboid is a square, so the breadth of the cuboid will be equal to its height, i.e. 1.2 cm

• Through the volume, we can know the length of cuboid by substituting the values.

• Then, we can take out the surface area of the cuboid.

Solution:

(We know that 1 cm³ = 1000 mm³. Therefore, the volume will be $\frac{5760}{1000}$=5.76 cm³)

$Volume\:of\:cuboid\:=l\times{b}\times{h}\\5.76=l\times{1.2}\times{1.2}\\l=\frac{5.76}{1.2\times{1.2}}\\l=4\:cm$

Now, Surface Area of Cuboid -

= 2(lb+bh+hl)

= 2×(4×1.2 + 1.2×1.2 + 1.2×4)

= 2×(4.8 + 1.44 + 4.8)

= 2× 11.04

= 22.08 cm²

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Hence, the surface area of cuboid is 22.08 cm².