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

	Riordan	Fred
Speed	300 m/min	250 m/min
Start time		4 min earlier
Extra distance covered at first		1000 m

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

Distance that Riordan covered more than Fred per min
= 300 - 250
= 50 m

Time that Riordan needed to take to cover the additional 1000 m
= 1000 ÷ 50
= 20 min

(b)
Time that Fred would had jogged when Riordan caught up with him
= 20 + 4
= 24 min

Distance that Fred would have jogged when Riordan caught up with him
= 24 x 250
= 6000 m

Answer(s): (a) 20 min; (b) 6000 m