A man has Tk. 1,00,000 to invest. He invests Tk. 40,000 at 5% and Tk. 35,000 at 4% interest rate. In order to have a yearly income of Tk. 5,000, at what rate of interest he must invest the reminder amount.
ABC is triangle in which AB = 3 cm, BC= 5 cm and AC = 4 cm. AD is a perpendicular from A to BC. Find the length of AD.
The ratio of the ages of a man and his wife is 4 : 3. After 4 years, the ratio will be 9:7. If at the time of marriage the ratio was 5: 3, then how many years ago were they married?
A trader, while selling an item, was asking for such a price that would enable him to of, a 20% discount and still make a profit of 30% on cost. If the cost of the item was Tk. 50 what was his asking price?
if x+y=a, x2+y2 and x3+y3=c3 then show that a3+2c3=3ab2
Solve the following Problem:
The average age of a committee of 8 members is 40 years. A member aged 55 years retired and his place was taken by another number aged 39 years. What will be the average age of the present committee?