Question

Un strung de tip B produce 60 de piese in 30 de minute, iar un strung de tip A produce 30 de piese in 10 minute.
Cate piese produc impreuna in acelasi timp cele doua strunguri in 20 de minute?

Answer 1

60-------30min<br />x----------20min<br />30x=60×20<br />30x=1200<br />x=1200:30=40 pise in 20 minute string tip B<br /><br /><br />30p--'----10min<br />x----------- 20min<br />10x=30×20<br />10x=600<br />x=600:10<br />x=60piese in 20 min. string tip A<br />60+40=100piese produc cele doua strunguri in 20 minute<br /><br />