Pablo and Linda both travelled from Tuguegarao to Manila for a convention. Pablo drove his car at an average speed of 50 km per hour, while Linda took a plane. Her trip required 1 hour, and his 9 hours. What was the average speed of Linda's plane?
distance=avg speed*time
50km/hr*9hr=avgspeedPlane*1hr
avgspeedPlane=450km/hr