Jenson and Tommy started jogging from the same point. Tommy started jogging 5 minutes earlier than Jenson. Jenson's jogging speed was 450 m/min and Tommy's jogging speed was 200 m/min. They went in the same direction and did not change their speeds throughout.
- How long did it take for Jenson to catch up with Tommy?
- What distance would Tommy have jogged when Jenson caught up with him? Express your answer in meters.
|
Jenson |
Tommy |
Speed |
450 m/min |
200 m/min |
Start time |
|
5 min earlier |
Extra distance covered at first |
|
1000 m |
(a)
Distance that Tommy covered when he jogged 5 minutes earlier
= 5 x 200
= 1000 m
Distance that Jenson covered more than Tommy per min
= 450 - 200
= 250 m
Time that Jenson needed to take to cover the additional 1000 m
= 1000 ÷ 250
= 4 min
(b)
Time that Tommy would had jogged when Jenson caught up with him
= 4 + 5
= 9 min
Distance that Tommy would have jogged when Jenson caught up with him
= 9 x 200
= 1800 m
Answer(s): (a) 4 min; (b) 1800 m