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:

'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?

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 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?

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?

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

A square field has its area equal to 324 m\(^2\). The perimeter of the field is:

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 closed metal box measures 30 cm × 20 cm × 10 cm. Thickness of the metal is 1 cm. The volume of the metal required to make the box is: