A retail buyer purchase 15 white dress shirts for Tk. 1000 and 5 striped dress shirts Tk. 400. At what average price the retailer should sell a dress shirt if he wants to make a proftit of Tk. 50 each shirt?

Alam spent 20% of his income on taxes and 20% of the remainder on rent. What percent of his income he has spen...

20 men can finish a work in 30 days after how many days should 5 men leave the work so that the work may be fi...

The pipe can independently fill a water tank in 10,12 and 15 hours. How many hours will take for all three pip...

In a class of 30 students 18 play football, 14 play cricket and 5 do not play any game. How many students play...

An amount of money becomes Tk. 1,860 at an interest rate of 8% in 3 years . How many years the money would tak...

If a : b= 4 : 7 and b : c= 5 : 6 ,then a : b : c is--