How many seconds does Sandy take to cover a distance of 600 meters, if Sandy runs at a speed of 15 km/hr?  Select
A) 128	B) 136	C) 144	D) 152	E) 160

Rationale: "15 km / hr = 15000 m / 3600 s = ( 150 / 36 ) m / s = ( 25 / 6 ) m / s time = 600 / ( 25 / 6 ) = 144 seconds the answer is c ."
Answer: C