Question

Cati litri de apa incap intr-un acvariu in forma de paralepiped dreptunghic ce are urmatoarele dimensiuni:
a)L=30cm, l=2,5 dm, h=40 cm;
b)L=15 dm, l=1,2 m, h=38 cm;
c)L=450 mm, l=20 cm, h=0,6 m;
d)L=0,04 dam, l=250 mm, h=10 cm?

Answer 1

a)L=30cm=3dm
l=2.5dm
h=40cm=4dm
V₁=L*l*h=3dm*2.5dm*4dm=30dm³=30l
b)L=15dm=
l=1,2m=12dm
h=38cm=3.8dm
V₂=L*l*h=15*12*3.8=684dm³=684l
c)L=450 mm=45cm=4.5dm
l=20 cm=5dm
h=0,6 m=6dm
V₃=L*l*h=4.5*5*6=165dm³=135l
d)L=0,04 dam=0.4m=4dm
l=250 mm=25cm=2.5dm
h=10 cm=1dm
V₄=L*l*h=4*2.5*1=10dm³=10l

Answer 2

a)$V=L*l*h=30cm*2,5dm*40cm=3dm*2,5dm*4dm=30dm ^{3}= \\ =30l$
b)$V=L*l*h=15dm*1,2m*38cm=15dm*12dm*3,8dm= \\ =684dm ^{3}= 684l$
c)$V=L*l*h=450mm*20cm*0,6m=4,5dm*2dm*6dm= \\ =54dm ^{3}= 54l$
d)$V=L*l*h=0,04dam*250mm*10cm=4dm*2,5dm*1dm= \\ =10dm ^{3}= 10l$