Japheth and Riordan started jogging from the same point. Riordan started jogging 4 minutes earlier than Japheth. Japheth's jogging speed was 500 m/min and Riordan's jogging speed was 250 m/min. They went in the same direction and did not change their speeds throughout.

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

	Japheth	Riordan
Speed	500 m/min	250 m/min
Start time		4 min earlier
Extra distance covered at first		1000 m

(a)
Distance that Riordan covered when he jogged 4 minutes earlier
= 4 x 250
= 1000 m

Distance that Japheth covered more than Riordan per min
= 500 - 250
= 250 m

Time that Japheth needed to take to cover the additional 1000 m
= 1000 ÷ 250
= 4 min

(b)
Time that Riordan would had jogged when Japheth caught up with him
= 4 + 4
= 8 min

Distance that Riordan would have jogged when Japheth caught up with him
= 8 x 250
= 2000 m

Answer(s): (a) 4 min; (b) 2000 m