English maths
let us say it is x km, then x/3-x/10=(27+15)/60x=3km
Let the distance be x.The equation is:x/3 - 15/60 = x/10 + 27/6020x - 15 = 6x + 27(20-6)x = 27+1514x = 42x = 42/14 = 3 KM
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