The water in a rectangular reservoir having a base 80m x 60m is 6.5m deep. In what time can the water be emptied by a pipe of which the cross-section is a square of side 20cm, if the water runs through the pipe at the rate of 15kmph?
A and B started a partnership business investing some amount in the ratio of 3 : 5. C joined then after six months with an amount equal to that of B. In what proportion should the profit be at the end of one year be distributed among A, B and C?