Question

O pompa electrica scoate din fintina 30 l de apa in 12 secunde cita apa scoate pompa in 10,18sec dar in 2min

Answer 1

30l.............12 sec
x  l...............10 sec

x=10*30/12
x=25 litri in 10 sec

30l..............12 sec
x  l...............18 sec

x=18*30/12
x=45 litri in 18 sec

30l...........12 sec
x  l...........120 sec

x=120*30/12
x=10*30
x=300 litri in 2 minute

Answer 2

30l⇒12s;
y⇒10s
⇒y=30l·10s/12s
⇒y=30l·5s/6s
⇒y=5l·5s
⇒y=25l;
⇒z⇒18sec
⇒z=30l·18s/12s
⇒z=30l·3s/2s
⇒z=15l·3s
⇒z=45l;
⇒2min=120s;
⇒x=30l·120s/12s
⇒x=30l·10s
⇒x=300l;