Question

plz answer this two questions as fast as possible

Answer 1

13.  The area of the field = 2hectares = 2 x 10000 m^2.

Area = 20000m^2

Imagining the situation, we get that the field with water would look like a cuboid with the height of the water as the cuboid's own height = 5cm = 0.05m.

Volume of water = Volume of the cuboid.

Volume of water = Length x Breadth x Height

Volume of water = Area x Height

Volume of water = (20000 x 0.05)m^3

Volume of water = 1000m^3


14. Speed of water = 3 kmph = 5/6 mps

But we have to find the quantity or volume of the water that runs into the sea per minute.

Distance covered in one sec by water = 5/6 meter
Distance covered in 1minute (60 sec) = [(5/6) x 60] m = 50m

This 50m is the length of the river in one minute. So the volume of water flowing in one minute would be equal to the volume of the cuboid so formed.

Remember that this cuboid is only an imagination and it is not like as if a cuboid is formed out for water.

Volume = Length x Depth x Width = 50m x 45m x 2m = 4500m^3

Now, 1m^3 = 1000 liters
4500m^3 = (4500 x 1000) liters= 4500000 litres


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