a string is tied around a rectangular packet 35 cm by 25 cm and over wrapping of 8 cm what is the length of the string
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area of rectangular packet = l = 35 cm
b = 25 cm extra wrap = 8 cm
therefore length of strings = 35 x 25 ÷ 8
= 875 ÷ 8 = 109.35 cm
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