Daniel and David started jogging from the same point. David started jogging 9 minutes earlier than Daniel. Daniel's jogging speed was 400 m/min and David's jogging speed was 200 m/min. They went in the same direction and did not change their speeds throughout.

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

	Daniel	David
Speed	400 m/min	200 m/min
Start time		9 min earlier
Extra distance covered at first		1800 m

(a)
Distance that David covered when he jogged 9 minutes earlier
= 9 x 200
= 1800 m

Distance that Daniel covered more than David per min
= 400 - 200
= 200 m

Time that Daniel needed to take to cover the additional 1800 m
= 1800 ÷ 200
= 9 min

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

Distance that David would have jogged when Daniel caught up with him
= 18 x 200
= 3600 m

Answer(s): (a) 9 min; (b) 3600 m