# Grandmother

Mom walked out to visit her grandmother in a neighboring village 5km away and moved at a speed of 4km/h.
An hour later, father drove down the same road at an average speed of 64km/h.

1) How long will take to catch mom die?
2) What is the approximate distance in meter meters? (round to an integer)

Result

t =  4 min
s =  4267 m

#### Solution:

4*(1+t/60) = 64*t/60

60t = 240

t = 4

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