David and Julian started jogging from the same point. Julian started jogging 9 minutes earlier than David. David's jogging speed was 200 m/min and Julian's jogging speed was 100 m/min. They went in the same direction and did not change their speeds throughout.

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

	David	Julian
Speed	200 m/min	100 m/min
Start time		9 min earlier
Extra distance covered at first		900 m

(a)
Distance that Julian covered when he jogged 9 minutes earlier
= 9 x 100
= 900 m

Distance that David covered more than Julian per min
= 200 - 100
= 100 m

Time that David needed to take to cover the additional 900 m
= 900 ÷ 100
= 9 min

(b)
Time that Julian would had jogged when David caught up with him
= 9 + 9
= 18 min

Distance that Julian would have jogged when David caught up with him
= 18 x 100
= 1800 m

Answer(s): (a) 9 min; (b) 1800 m