Jack and Ben started jogging from the same point. Ben started jogging 4 minutes earlier than Jack. Jack's jogging speed was 500 m/min and Ben'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 Jack to catch up with Ben? 
2. What distance would Ben have jogged when Jack caught up with him?  Express your answer in meters.

	Jack	Ben
Speed	500 m/min	100 m/min
Start time		4 min earlier
Extra distance covered at first		400 m

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

Distance that Jack covered more than Ben per min
= 500 - 100
= 400 m

Time that Jack needed to take to cover the additional 400 m
= 400 ÷ 400
= 1 min

(b)
Time that Ben would had jogged when Jack caught up with him
= 1 + 4
= 5 min

Distance that Ben would have jogged when Jack caught up with him
= 5 x 100
= 500 m

Answer(s): (a) 1 min; (b) 500 m