Mark and Ben started jogging from the same point. Ben started jogging 9 minutes earlier than Mark. Mark's jogging speed was 500 m/min and Ben's jogging speed was 350 m/min. They went in the same direction and did not change their speeds throughout.

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

	Mark	Ben
Speed	500 m/min	350 m/min
Start time		9 min earlier
Extra distance covered at first		3150 m

(a)
Distance that Ben covered when he jogged 9 minutes earlier
= 9 x 350
= 3150 m

Distance that Mark covered more than Ben per min
= 500 - 350
= 150 m

Time that Mark needed to take to cover the additional 3150 m
= 3150 ÷ 150
= 21 min

(b)
Time that Ben would had jogged when Mark caught up with him
= 21 + 9
= 30 min

Distance that Ben would have jogged when Mark caught up with him
= 30 x 350
= 10500 m

Answer(s): (a) 21 min; (b) 10500 m