A sum was invested at simple interest at x% p.a. for \(2\tfrac{1}{2}\) years. Had it been invested at (x + 3)% for the same time, it would have fetched ₹585 more. The simple interest on the same sum for \(4\tfrac{2}{3}\) years at 14% p.a. is:
In a group of 108 persons, the ratio of the number of males and females is 5 : 4. The average height of the males is 158.7 cm and that of the females x is cm. If the average height of all the persons in the group is 155.5 cm, then the value of x is: