## Answers

1) Given:

V = volume of water = 150 lt =

the container is cubical.

density of water = .

Let the side length of the cubical container is L.

a) mass of water taken = m = volume * density of water = .

b) The volume of container is .

therefore,

therefore, the side length of the cubical container is 0.53 m. [answer]

c) The useful observations are, the amount of water in **litre** is equal to amount of water in **kilogram**.

2) weight of water in the tank is equal to

mg = 150*9.81 = 1471.5 N [answer]

3) Given:

r = radius of cylindrical container = 8 cm = 0.08 m

Let the height of water column be 'h'.

Volume of cylindrical shape is given by [where r = radius, h = height]

Now, volume of water taken :

Now, equating the volume of water to the volume of cylindrical shape

[answer]

4) Given:

density of ice =

volume of ice taken =

mass of ice = m = volume * density = [answer]

weight of ice = mg = [answer]