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A train `100 m` long moving on a straight level track passes a pole in `5 s`. Find (a) the speed of the train (b) the time it will take to cross a bridge `500 m` long. |
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Answer» Correct Answer - (a) `20 m//s` , (b) `30s` (a) velocity `= ("distance travelled")/("time taken")` , i.e ., `v = ( 100 m)/( 5 s) = 20 m//s` (b) length of bridge `= 500 m`, length of train `= 100 m` In crossing the bridge, distance moved, `s = 500 + 100 = 600 m` , time , `t = (s)/( v) = (600)/(20) = 30s` |
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