Question

Kara hiked 14 km at 4 km/h and then hiked another 12 km at 5 km/h .

How long did the hike last?

A.
5 hours

B.
5.9 hours

C.
8.4 hours

D.
116 hours

Answer 1

so hiked 4km ----- 1 hour = 60 min.
14 km ----- x
--------------------------
x = 14*60/4 = 14*15 = 210 min. = 3 h 30 min.

and so again hiked 15 km by 5km/h

so 5km ------------- 1 hour =60 min.
12 km ------------ x
----------------------------
x = 12*60/5 = 12*12 = 144 min = 2 h 24 min.

so total 3 h 30 min. +2 h 24 min. = 5 h 54 min.