Water in a canal , 30 dm wide and 12 dm deep , is flowing with a velocity of 20 km per hour. How much area will it irrigate in 30 min , if 9 cm of standing water is desired?

Water in a canal, 6 m wide and 1.5 m deep, is flowing with a speed of 10 km / h . How much area will it irrigate in 30 minutes, if 8 cm of standing water is needed?

Water in a canal, 6 m wide and 1.5 m deep, is flowing with a speed of 10 km/h. How much area will it irrigate in 30 minutes, if 8 cm of standing water is needed?

Water in a canal, 30\ d m\ w i d e\ a n d\ 12 d m\ d e e p ,\ is flowing with a velocity of 20 k m\ p e r\ hou rdot How many area will it irrigate in 30min, if 9\ c m of standing water is desired?

Water in a canal, 30\ d m\ w i d e\ a n d\ 12 d m\ d e e p ,\ is flowing with a velocity of 20 k m\ p e r\ hou rdot How many area will it irrigate in 30\ m in ,\ if 9\ c m of standing water is desired?

Water in a canal, 2·4 m wide and 1·8 m deep, is flowing with a speed of 50 km/hour. How much area can it irrigate in 40 minutes, if 10 cm of standing water is required for irrigation ?

A river 3 m deep and 40 m wide is flowing at the rate of 2 km per hour. How much water will fall into the sea in a minute?

A farmer connects a pipe of internal diameter 20 cm from a canal into a cylindrical tank in her field, which is 10 m in diameter and 2 m deep. If water flows through the pipe at the rate of 3 km/h, in how much time will the tank be filled?

A farmer connects a pipe of internal diameter 20 cm from a canal into a cylindrical tank in her field, which is 10 m in diameter and 2 m deep. If water flows through the pipe at the rate of 3 km/h, in how much time will the tank be filled?

A rectangular tank is 80m long and 25m broad. Water flows into it through a pipe whose cross-section is 25 c m^2, at the rate of 16km per hour. How much the level of the water rises in the tank in 45 minutes.

A 400 m wide river is flowing at a rate of 2.0 m s^-1 . A boat is sailing with a velocity of 10 m s^-1 with respect to the water, in a direction perpendicular to the river. (a) Find the time taken by the boat to reach the opposite bank. (b) How far from the point directly opposite to the starting point does the boat reach the opposite bank ? ( c) In what direction does the boat actually move ?