Riordan and Ken started jogging from the same point. Ken started jogging 10 minutes earlier than Riordan. Riordan's jogging speed was 200 m/min and Ken's jogging speed was 150 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 Ken? 
2. What distance would Ken have jogged when Riordan caught up with him?  Express your answer in meters.

	Riordan	Ken
Speed	200 m/min	150 m/min
Start time		10 min earlier
Extra distance covered at first		1500 m

(a)
Distance that Ken covered when he jogged 10 minutes earlier
= 10 x 150
= 1500 m

Distance that Riordan covered more than Ken per min
= 200 - 150
= 50 m

Time that Riordan needed to take to cover the additional 1500 m
= 1500 ÷ 50
= 30 min

(b)
Time that Ken would had jogged when Riordan caught up with him
= 30 + 10
= 40 min

Distance that Ken would have jogged when Riordan caught up with him
= 40 x 150
= 6000 m

Answer(s): (a) 30 min; (b) 6000 m