Two people

Two straight lines cross at right angles. Two people start simultaneously at the point of intersection. John walking at the rate of 4 kph in one road, Jenelyn walking at the rate of 8 kph on the other road. How long will it take for them to be 20√5 km apart

Correct answer:

t =  5 h

Step-by-step explanation:

v1=4 km/h v2=8 km/h  s=20 5=20 5 km44.7214 km  v=v12+v22=42+82=4 5 km/h8.9443 km/h  t=s/v=44.7214/8.9443=5 h



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