Question

The total surface area of a cubical box is 486 cm²; find the length of its one side. Also, find the area of its four walls.

Answer 1

Answer:

Length of one side = 9 cm.

Area of its four walls = 324 cm²

Step-by-step explanation:

TSA of a cube = 6a²

=> 6a² = 486 cm²

=> a² = 81 cm²

Hence a = 9 cm.

Hence side of the cubical box is 9cm.

LSA of a cube = 4a²

=> LSA = 4(9)²

Hence LSA of the cubical box is 324 cm².

Thanks !