Question

A copy machine makes 105 copies in 3 minutes and 45 seconds. How many copies does it make per minute?

Answer 1

remember that a minute is 60 sseconds
then you'll have it as:
\[\frac{ 105 }{ 3 + \frac{ 45 }{ 60 } } = \frac{ 105 }{ \frac{ 225 }{ 60 } }\]
\[ \frac{ 105 }{ \frac{ 225 }{ 60 } } = \frac{ 60(105) }{ 225 }\]
= 28pcs/min

Answer 2

Correct.