A mixture of 40 L of alcohol and water contains 10% water. How much water should be added to this mixture, so that the new mixture contains 20% water?

If 80% of A = 20% of B and B = 5x% of A, then the value of x is:

'A' can do a piece of work in 20 days and 'B' can do the same work in 15 days. How long will they take to finish the work, if both work together?

Father is 3 years older than the mother and the mother's age is now twice the daughter's age. If the daughter is 20 years old now, then the father's age when the daughter was born is:

A man can row 5 km/h in still water. If the speed of the current is 1 km/h, it takes 3 hrs more in upstream than in the downstream for the same distance. The distance is:

An employer reduces the number of employees in the ratio 8:5 and increases their wages in the ratio 7:9. Therefore, the overall wages bill is:

A starts a business with Rs. 5000 and B joins the business 5 months later with an investment of Rs. 6000. After a year they earn a profit of Rs. 34000, find the shares of A and B in the profit amount depending on their individual investment.

A person covers a certain distance by car at a speed of 30 km/h and comes back at a speed of 40 km/h. The average speed during the travel is:

A farmer has some hens and some goats. If the total number of animal heads is 80 and the total number of animal feet is 200, what is the total number of goats?