The surface area of three faces of a cuboid sharing a vertex are given as 25 m2, 32 m2 and 32 m2. What is the volume of the cuboid?

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RRC Group D Previous Paper 6 (Held On: 24 Sep 2018 Shift 1)
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  1. 160 m3
  2. 92 m3
  3. 184 m3
  4. √3024 m3

Answer (Detailed Solution Below)

Option 1 : 160 m3
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Detailed Solution

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Given:

The surface area of three faces = 25 m2, 32 m2 and 32 m2 

Concept used:

The surface area of one face

1.) Length × Breadth

2.) Breadth × Height

3.) Height × Length

Volume of cuboid = Length × Breadth × Height

Calculations:

We have,

⇒ Length × Breadth = 25 m2

⇒ Breadth × Height = 32 m2

⇒ Height × Length = 32 m2

Multiplying the above three equations, we get,

⇒ (Length × Breadth × Height)2 = 25 × 32 × 32

Taking square root on both sides,

⇒ (Length × breadth × Height) = 5 × 32

⇒ Length × breadth × Height = 160

⇒ Volume of cuboid = 160 m

∴ The volume of cuboid is 160 m3

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