Answer :
28 stops every 2 hours
14 stops every 1 hour
no. of stops= no. of hours * 14
3 hours:
stops= 3*14
=42
4 hours:
stops= 4*14
=56
14 stops every 1 hour
no. of stops= no. of hours * 14
3 hours:
stops= 3*14
=42
4 hours:
stops= 4*14
=56