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Anonymous
How long is 20 cm
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Perimeter = 25+20+25+20 = 90 cm
90
It is 0.02 metres or 20 millimetres.
Multiply 20 x 15 x 78 = 23400 cubic cm = 1428 cubic inches
volume = length x width x height = 20 x 10 x3 = 600 cubic cm