A hiker walking at a constatnt rate of 4 miles/hr is passed by a cyclist travelling in the same direction along the same path at a constant rate of 20miles/hr. The cyclist stops to wait for the hiker 5 mins after passing her, while the hiker continues to walk at the constant rate. How many mins must the cyclist wait until the hiker catches up.
A 6 2/3
E 26 2/3
pls xplain y oa is C here...i thought it was D
In 5 mins, both traveled:
Hiker: (4/60)*5 = 1/3 mile
Biker: (20/60)*5 = 5/3 mile
Therefore, Biker has to waited: 5/3 - 1/3 = 4/3 miles.
Time for Hiker to travel 4/3 mile: (60/4)*(4/3) = 20mins.