This task is about distance, speed and time.
The diagram above shows a railway line. The distance between each circular marker is 1 kilometre. There are 5 stations on the line, A, B, C, D, and E, each marked with an X.
An inspection railcar (jigger) travels from A to E at a steady speed checking the tracks, without stopping at any station. It starts at 9.00 a.m. and takes an hour to do the whole journey.
| a) |
How many kilometres is it from A to E? __________ km |
| b) |
What is the average speed of the jigger? __________ km/h |
| c) |
Complete this table, showing the time the jigger passes through each of stations B, C, and D: |
| Station | Time |
| A | 9:00 a.m. |
| B | |
| C | |
| D | |
| E |
10:00 a.m.
|
|
d) |
Which of the following expressions describes how many kilometres from A the jigger is, t minutes after leaving? |
|
(A) (B) (C) (D) (E) |
t/5 t/2 t – 4 5t 12t |