If a 50 liters mixture of milk and water is in the ratio of 3 : 2. After removal of 10 liters mixture, 12 liters milk and 12 liters water is added into the mixture. Find the final ratio of water and milk in the mixture.

A man can row at 7 km/hour in still water. He finds that it takes twice the time to row upstream than the time to row downstream. The speed of the stream is

What is a point at equidistant from the vertices of a triangle called?

What value will come in place of question marks (?) in the following questions?

2632 ÷ 94 = ? + 53

If 4x² + y² = 40 and xy = 6, then find the value of 2x + y.

A tank can be filled with water by two pipes A and B together in 36 minutes. If the pipe B was closed after 30 minutes, the tank is filled in 40 minutes. The pipe B can alone fill the tank in?

If the present worth of a certain sum due 2 years hence at 10% per annum at a compound interest principal is Rs. 2500, find the amount.

A square and an equilateral triangle are drawn on the same base. the ratio of their area is