Answer:
16.7 km.
Step-by-step explanation:
1) use the formula: S=v*t, where S - distance, v - velosity, t - time.
2) the velocity should be converted from km/h into km/min: v=20 km/h=20/60 km/min=1/3 km/min;
3) after the substitution into the formula:
S=1/3*50=50/3≈16.7 km.
