The given bar-graph shows the number of boys and girls in classes A, B, C and D in a school, and the number of teachers allotted to each class.
Which class has the least percentage of girls?
Two cars X and Y start running towards each other from two places 216 km apart. The ratio of the speeds of X and Y is 5:7 and the speed of X is 60 km/h. After how many minutes will X and Y meet each other?