A rectangular photography 15cm by 9cm is pasted on a rectangular card.if a margin of 2.5cm is left round the photograph, find the perimeter of the card.?
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Perimeter of Card =
2 [(15 + 2.5) + (9 + 2.5)]
= 2 (17.5 + 11.5)
= 2 × 29
Perimeter = 58
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