Riordan and Oliver started jogging from the same point. Oliver started jogging 10 minutes earlier than Riordan. Riordan's jogging speed was 450 m/min and Oliver's jogging speed was 300 m/min. They went in the same direction and did not change their speeds throughout.

1. How long did it take for Riordan to catch up with Oliver? 
2. What distance would Oliver have jogged when Riordan caught up with him?  Express your answer in meters.

	Riordan	Oliver
Speed	450 m/min	300 m/min
Start time		10 min earlier
Extra distance covered at first		3000 m

(a)
Distance that Oliver covered when he jogged 10 minutes earlier
= 10 x 300
= 3000 m

Distance that Riordan covered more than Oliver per min
= 450 - 300
= 150 m

Time that Riordan needed to take to cover the additional 3000 m
= 3000 ÷ 150
= 20 min

(b)
Time that Oliver would had jogged when Riordan caught up with him
= 20 + 10
= 30 min

Distance that Oliver would have jogged when Riordan caught up with him
= 30 x 300
= 9000 m

Answer(s): (a) 20 min; (b) 9000 m