1.

If the total surface area of a cuboid of length 6 cm and breadth 5 cm is 126 sq cm, then its height is:1. 5 cm2. 3.5 cm3. 4 cm4. 3 cm

Answer» Correct Answer - Option 4 : 3 cm

Given:

Total surface area of a cuboid =126 sq. cm

Length and breadth of the cuboid is 6 cm and 5 cm respectively

Concept used:

Total surface area of a cuboid =2(lb + bh + hl)

⇒ 2(30 + 5h + 6h) =126

⇒ 60 + 10h + 12h =126

⇒ 22h =66

⇒ h =3 cm

∴ The height of the cuboid is 3 cm 

 



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