Question

A white rectangular board 28 cm long and 16 cm wide is placed in the centre of a large rectangular wooden board. It creates a border of 2 cm around it. Find the area not covered by the white board.

Answer 1

the area not covered by the white board. = 192 cm²

Step-by-step explanation:

A white rectangular board 28 cm long and 16 cm wide

Area of White Board = 28 * 16

wooden board creates a border of 2 cm around it.

Wooden Board Size = ( 28 + 2 + 2)   , (16 + 2 + 2)

Wooden board Area = (28 + 4) * ( 16 + 4)

= 28 * 16  + 28 * 4 + 16 * 4 + 4 * 4

= 28 * 16 + 112 + 64 + 16

= 28 * 16 + 192

the area not covered by the white board. = 28 * 16 + 192 - 28 * 16

= 192 cm²

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