Question

o pompa electrica din fintina 30l de apa in 12 secunde.
a) in cit timp se va umple cu pa un butoi de 800l? dar de 1000l?

Answer 1

A) 800 * 12 : 30 = 320 SEC.
B) 1000 * 12 : 30 = 400 SEC.
a) 30 l........12 sec.
   800 l..........x
x = 800 * 12 : 30 = 9600 : 30 = 320 sec.
b) 30 l......12 sevc.
1000 l..........x
x = 1000 * 12/30 = 12000 : 30 = 400 sec. 

Answer 2

30l  ......12 secunde.
800l.......x secunde.
x=800×12÷30 = 9600÷30.        x=320.

30l  ........12 secunde.
1000l .......x secunde.
x=1000×12÷30 = 12000÷30.     x=400.