Question

Toate exercitiile 1, 2, 3, 4, 5, 6 repede va rog frumos

Answer 1

1.a)50; 900; 8300; 5,6
   b)5700; 260; 2,103

2.a)l=5,4m si L=16,2m =>P=2l+2L=10,8+32,4=43,2m
   b)l=3,5m si L=3,63m =>P=2l+2L=7+7,26=14,26m
   c)V=26dmx14dmx13dm=4732dm³

3.28minx60sec=1680sec
     7ore->7x60, adica 420min->420minx60sec=25200sec
     2 zile=48ore sau 48x60, adica 2880min->2880minx60=172800sec
Total : 172800sec+25200sec+1680sec=199680sec

4.223-196=27 bidoane
1026 litri : 27 bidoane = 38 litri sunt intr-un bidon
=>la primul magazin s-au adus 223x38=8474 litri
=>la al doilea magazin s-au adus 196x38=7448 litri

5.a+b+c=1350
a-x=216 =>a=216+x
b-x=348 =>b=348+x
c-x=396 =>c=396+x
216+x+348+x+396+x=1350
3x=1350-960
3x=390 =>x=130
=>a=346
=>b=478
=>c=526

6.2L+2l=106m =>L+l=53
0,6=6/10=3/5
l = 5 + 3L/5 
L+5+3L/5=53 
5L+25+3L=265
8L=265-25
8L=240 =>L=30 =>l=23
=>Aria=Lxl=690m²