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प्रश्न
Length and breadth of a bulletin board are r cm and t cm, respectively.
What will be the length (in cm) of the aluminium strip required to frame the board, if 10 cm extra strip is required to fix it properly.
बेरीज
उत्तर
We have given, length of the board = r cm and breadth = t cm.
The length of aluminium strip to frame the board = Perimeter of the board
= 2(length + breadth)
= 2(r + t) cm
But 10 cm extra strip is required to fix it properly.
∴ Total length of the aluminium strip = 2(r + t) cm + 10 cm.
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