Răspuns :
Răspuns:
A) Folosești regula de 3 simpla :
15.........20
10..........x
X= 15•20/10 = 30 de ore
B) 15.........20
Y.........60
Y= 15•60/20 = 45 robinete
Răspuns:
A) 10x15:20=150:20=75 (ore) ;
B) 15x60:20=900:15=60(robinete)
Răspuns:
A) Folosești regula de 3 simpla :
15.........20
10..........x
X= 15•20/10 = 30 de ore
B) 15.........20
Y.........60
Y= 15•60/20 = 45 robinete
Răspuns:
A) 10x15:20=150:20=75 (ore) ;
B) 15x60:20=900:15=60(robinete)