5 times 20cm = 1 meter
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0.2
1 day has 24 hours. 1 day is 12 times long than 2 hours.
100
you only need to measure 1. say it was a square with a side that's 5cm long then you go 5x4 and you've got the answer: 20cm perimiter!
V = (1/3)pi*r2*h V = (1/3)pi(1 cm)2 * 20cm = 21 cm3 =======