Answer:
19 sit-ups per minute ;
95 sit-ups
Step-by-step explanation:
Given that :
Number of sit-ups done in 3 minutes = 57
The unit rate of sit-ups done can be obtained thus :
Total Number of sit-ups done / total time taken
= 57 sit-ups /3 minutes
= 19 sit-ups per minute
. Number of sit-ups that can be done in 5 minutes :
Unit Rate of sit-ups * number of minutes
19 sit-ups / minute * 5 minutes
= 95 (sit-ups / minute * minute)
= 95 sit-ups
