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Question: Estimate the perimeter of the cover of the book.



A ) 98 cm
B ) 238 cm
C ) 190 cm
D ) 138 cm

Steps to derive

1 The perimeter of the cover of the book = 2(25) + 4(20) + 2(4)

2 = 50 + 80 + 8 = 138

3 So, the perimeter of the cover of the book is 138 cm.



Hence the right answer is Option D

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