4400 Higher November 2009 Paper 3 Q23
23 In a race, Paula runs 25 laps of a track.
Each lap of the track is 400 m, correct to the nearest metre.
Paula’s average speed is 5.0 m/s, correct to one decimal place.
Calculate the upper bound for the time that Paula takes to run the race.
Give your answer in minutes and seconds, correct to the nearest second.
(4)
| Scheme | Marks |
|---|---|
| \(d/s = t\) 25 × 400.5 / 4.95 (= 2022.727...) secs | M2 |
| “2022.727”/60 (= 33.712..) mins | M1 |
| 33 mins 43 secs | A1 |
| (4) | |
| (4 marks) |
Notes
M2: M1 for 400.5 or 4.95 seen
M1: dep on at least 1 previous M1
A1: cao