A boy has taken a shortcut on which there is a railway track that goes thro a narrow bridge. When the boy coverered 7/16th of the track in the bridge, he heard the whistle of the train. Then he ran out of the bridge, when the train came to that bridge. If he were taken a actual route he wuold have reached the destination on time rather taking the shortcot & running out of the bridge. The boy covers 4km/hr What was the speed the train?Q. There are 100 men in town out of which 85% were married, 70% have a phone, 75% own a car, 80% own a house.What is the maximum No. of people who are married own aphone, own a car & own a house?