David and Paul started jogging from the same point. Paul started jogging 4 minutes earlier than David. David's jogging speed was 300 m/min and Paul'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 Paul? 
2. What distance would Paul have jogged when David caught up with him?  Express your answer in meters.

	David	Paul
Speed	300 m/min	100 m/min
Start time		4 min earlier
Extra distance covered at first		400 m

(a)
Distance that Paul covered when he jogged 4 minutes earlier
= 4 x 100
= 400 m

Distance that David covered more than Paul per min
= 300 - 100
= 200 m

Time that David needed to take to cover the additional 400 m
= 400 ÷ 200
= 2 min

(b)
Time that Paul would had jogged when David caught up with him
= 2 + 4
= 6 min

Distance that Paul would have jogged when David caught up with him
= 6 x 100
= 600 m

Answer(s): (a) 2 min; (b) 600 m