Riordan and Ahmad started jogging from the same point. Ahmad started jogging 9 minutes earlier than Riordan. Riordan's jogging speed was 450 m/min and Ahmad'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 Ahmad? 
2. What distance would Ahmad have jogged when Riordan caught up with him?  Express your answer in meters.

	Riordan	Ahmad
Speed	450 m/min	300 m/min
Start time		9 min earlier
Extra distance covered at first		2700 m

(a)
Distance that Ahmad covered when he jogged 9 minutes earlier
= 9 x 300
= 2700 m

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

Time that Riordan needed to take to cover the additional 2700 m
= 2700 ÷ 150
= 18 min

(b)
Time that Ahmad would had jogged when Riordan caught up with him
= 18 + 9
= 27 min

Distance that Ahmad would have jogged when Riordan caught up with him
= 27 x 300
= 8100 m

Answer(s): (a) 18 min; (b) 8100 m