Question

Un cub are latura eg cu:

a)1 dm b)2 dm c)30 cm d)5 m e)600mm f)0,25 m

Calculati volumul cubului si apoi stabiliti cati litri de apa incapin cub(in fiecare caz in parte).

Ma puteri ajuta??

Answer 1

V$V_{cub}= l^{3}=l*l*l$
stim bine ca $1dm^{3}=un litru(l)$
a)1dm*1dm*1dm=$1dm^{3}$=un litru
b)2dm*2dm*2dm=$8dm^{3}$=8 litri
c)30 cm=30:10=3dm⇒3dm*3dm*3dm=$3^{3}dm= 9dm^{3}$=9 litri
d)5m*10=50 dm⇒50dm*50dm*50dm=$125000dm^{3}$=125000 litri
e)600 mm:100=6dm⇒6dm*6dm*6dm=$6^{3}dm= 216dm^{3}$=216 litri
f)0,25m*10=2,5dm⇒2,5dm*2,5dm*2,5dm=$2,5^{3}dm=15,625dm^{3}$=15,625 litri.