| Date | May 2018 | Marks available | 1 | Reference code | 18M.1.SL.TZ2.14 |
| Level | Standard level | Paper | Paper 1 | Time zone | Time zone 2 |
| Command term | Question number | 14 | Adapted from | N/A |
Question
Two sound waves from a point source on the ground travel through the ground to a detector. The speed of one wave is 7.5 km s–1, the speed of the other wave is 5.0 km s–1. The waves arrive at the detector 15 s apart. What is the distance from the point source to the detector?
A. 38 km
B. 45 km
C. 113 km
D. 225 km
Markscheme
D
Examiners report
[N/A]
