Mr. Jamal employed 50 workers to finish a work within 30 days. After 20 days he found out that only 50% work had been completed. How many additional workers would be need to finish the task in scheduled time?

The ratio of boys and girls in a class is 4:5. If 10% of the boys and 20%of the girls failed In an examination...

In a store,shirts are sold for 25% less than the tag price. If a shirt costs Tk.480, what would be the tag pri...

Arif is 4 times as old as Bobby,in 6 years, Bobby will be twice as old as Sara. Four years from now Arif will...

If the average (arithmetic mean) of x and y is 60 and the average(arithmetic mean)of y and z is 80,what is the...

Five boys or 9 girls can do a piece of work in 19 days.In how many days can 3 boys and 6 girls do this work?

By selling a TV for Tk.29,500 instead of Tk.30,000,the profit decreases by 10%. What is the cost of the TV in...