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15 cm long and 5 cm wide is pretty nearly 15 cm long.
A rectangular prism that is 6 cm long, 2 cm wide and 5 cm high has a volume of 60cm3
20 cm. is almost as wide as the standard phone book. Or to put it in other terms, standard letter paper is 8 1/2 inches wide, or 21.5 cm.
56cm2
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