40 cm = 15.748 inches so it is longer than 13 inches.
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40 centimetres = 15.75 inches
40 inches is101.6 centimetres.
40 centimeters x 1 inch/2.54 centimeters = 15.75 inches
40 centimeters is longer.
1in = 2.54cm 40cm x 1in/2.54cm = 15.7in