Q14 of 94 Page 222

A river 2 m deep and 45 m wide is flowing at the rate of 3 km/h. Find the quantity of water that runs into the sea per minute.

It is given in the question that,


Area of cross section of river = 45m × 2m = 90 m2


 


Rate of flow = 3 km/hr 



= 50 m/min


Therefore,


Volume of water flowing through the cross-section in one minute = 90 m2 × 50 m/min


 


= 4500 m3 per minute


 

More from this chapter

All 94 →
12

The volume of a block of gold is 0.5 m3. If it is hammered into a sheet to cover an area of 1 hectare, find the thickness of the sheet.

 13

The rainfall recorded on a certain day was 5 cm. Find the volume of water that fell on a 2-hectare field.

 15

A pit 5 m long and 3.5 m wide is dug to a certain depth. If the volume of earth taken out of it is 14 m3, what is the depth of the pit?

 16

A rectangular water tank is 90 cm wide and 40 cm deep. If it can contain 576 litres of water, what is its length?