A small village having a populations of 5000, requires 75 litres of water per head per day. The village has got an overhead tank of measurement `40mxx25mxx15m`. The how many days will the water of this tank last?

A village, having a population of 4000, requires 150 litres of water per head per day. It has a tank measuring 20 m by 15 m by 6 m. For how many days will the water of this tank last ?

A taxi- driver filled his car petrol tank with 40 litres of petrol on Mondy.The next day,he filled the tank with 50 litres of petrol.If the petrol costs Rs.44 per litre,how much did he spend in all on petrol?

Water flows out through a circular pipe, whose internal diameter is 2 cm, at the rate of 0.7 m per second into a cylindrical tank, the radius of whose base is 40 cm. By how much will the level of water rise in half an hour ?

The bottom of a rectangular swimming tank is 25 m by 40m. Water is pumped into the tank at the rate of 500 cubic metres per minute. Find the rate at which the level of water in the tank is rising.

Water flows in a tank 200mxx150m at the base, through a pipe whose cross section is 2 dm by 1.5 dm at the speed of 15 km per hour in what time, will the water by 3 metres deep?

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

Hameed has built a cubical water tank with lid for his house, with each outer edge 1.5 m long. He gets the outer surface of the tank excluding the base, covered with square tiles of side 25 cm (see Fig. 13.5). Find how much he would spend for the tiles, if the cost of the tiles is ₹ 360 per dozen.