A and B started a business with initial investments in the respective ratio of 5 : 7. If after one year their profits were in the respective ratio of 1 : 2 and the period for A's investment was 7 months, B invested the money for
The speeds of John and Max are 30 km/h and 40 km/h respectively. Initially Max is at the place L and John is at the place M. The distance between L and M is 650 km. John started his journey 3 hours earlier than Max to meet each other. If they meet each other at a place P somewhere between L and M, then the distance between P and M is :
The average weight of boys in a class is 30 kg and the average weight of girls in the same class is 20 kg. If the average weight of the whole class is 23.25 kg, what could be the possible strength of boys and girls respectively in the same class?