Question

A barrel floats down a river past two flags that are 100 meters apart. The time it took for the barrel to pass each flag is shown. What is the speed of the river’s current?
1075AQ2
0.28 m/s
2.2 m/s
2.4 m/s
3.6 m/s

Answer 1

I don't have the times/diagram you mention, so I can't compute a numerical answer yet. If the barrel passes the two flags at times t1 and t2 (seconds) and the flags are 100 m apart, the river speed is simply

v = distance / travel time = 100 / (t2 − t1) m/s.

Please tell me the two times (or upload the picture) and I'll compute which multiple‑choice value is correct.