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)

Correct result:

t =  4 min
s =  4267 m

Solution:


4•(1+t/60) = 64•t/60

60t = 240

t = 4

Our simple equation calculator calculates it.
s1=64 t/60=64 4/60=64154.2667 km s=s1 m=s1 1000  m=4.2667 1000  m=4267 m



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