Mary cycles at 6 km per hour.How long will she take to reach her Aunt's house which is 12 km away? If she cycles at a speed of 4 km per hr,how long would she take? Share with your friends Share 0 Anup Raj answered this 0 View Full Answer Tejaswini J answered this ????? 0 Abhyush Dixit answered this If she travels : -6 km/ hr = 12 / 6 =2 HOURS 4 KM/ HR = 12/4 =3 HOURS 4