Question
It takes Machine R and Machine B 25 minutes to print a total of 1250 copies of posters. Machine R can print 20 copies of posters in one minute. How many copies of posters can Machine S print per minute?
2 m

Click button first when a symbol is required. X

It takes Machine R and Machine B 25 minutes to print a total of 1250 copies of posters. Machine R can print 20 copies of posters in one minute. How many copies of posters can Machine S print per minute?