Fred and Riordan started jogging from the same point. Riordan started jogging 3 minutes earlier than Fred. Fred's jogging speed was 400 m/min and Riordan'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 Fred to catch up with Riordan? 
2. What distance would Riordan have jogged when Fred caught up with him?  Express your answer in meters.

	Fred	Riordan
Speed	400 m/min	100 m/min
Start time		3 min earlier
Extra distance covered at first		300 m

(a)
Distance that Riordan covered when he jogged 3 minutes earlier
= 3 x 100
= 300 m

Distance that Fred covered more than Riordan per min
= 400 - 100
= 300 m

Time that Fred needed to take to cover the additional 300 m
= 300 ÷ 300
= 1 min

(b)
Time that Riordan would had jogged when Fred caught up with him
= 1 + 3
= 4 min

Distance that Riordan would have jogged when Fred caught up with him
= 4 x 100
= 400 m

Answer(s): (a) 1 min; (b) 400 m