Show how to tell jell a trains speed count the clicks of the wheels on one rall rail because joints alternate for 20 seconds and the result will be the tbt miles per hour the train Is running there are 30 foot rails li IL 6 feet feel the train say Is traveling at 45 miles per hour it covers 1256 rails in one minute or rails to in one second which multiplied by 20 equals 45 rails in 20 seconds or 45 miles per hour it 32 foot rails are used the results would be 40 rails in 20 seconds at 45 miles per hour but it la is fairly accurate and can be done dona easily with a little practice |