A copy machine makes 147 copies in 5 minutes an 15 seconds how many copies does it make per minute

28

Step-by-step explanation:

number of copies done in 5 minute 15 seconds = 147

60 seconds is equal to 1 minute

1 second is equal to 1/60 minutes

therefore 15 seconds is equal to 1/60 * 15 minutes = 1/4 minutes

thus,

number of copies done in 5 1/4 minute = 147

number of copies done in 1 minute = 147 / 5 1/4 (as 147/21 = 7)

= 147 / (21/4) = 7*4 = 28

Thus, A copy machine makes 28 copies in 1 minute.