Show working: A boy standing on an overhead bridge overlooking a highway wanted to drop a stone on a trunk passing under the bridge.He release the stone just as the front end of the trunk passes directly below the railing if the trunk is travelling at 55km/hr and is 12m long how far above the trunk must the railing be if the stone just misses the rear of the trunk?
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Asked by Idoye on 8th November, 2013
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