A rectangular block of ice measures 40cm by 25cm by 15cm. Calculate its weight in kg, if ice weighs `9/(10)` of the weight of the same volume of water and `1\ c m^3` of water weighs 1 gm.

A solid rectangular piece of iron measures 6m by 6cm by 2cm. Find the weight of this piece, if 1c m^3 iron weighs 8gm.

From a rectangular solid of metal 42 cm by 30 cm by 20 cm, a conical cavity of diameter 14 cm and depth 24 cm is drilled out. Find : the weight of the material drilled out if it weighs 7 gm per cm^(3).

A block of steel of size 5 cm xx 5cm xx 5cm is weighed in water. If the relative density of steel is 7. its apparent weight is:

The weight of metal block of size 5cm by 4cm by 3cm is 1kg. Find the weight of a block of the same metal of size 15cm by 8cm by 3cm.

A body of volume 100cm^(3) weighs 1 kgf in air. Find (i) its weight in water and (ii) its relative density

On a winter day when the atmospheric temperature drops to -10^(@)C , ice forms on the surface of a lake. (a) Calculate the rate of increases of thickness of the ice when 10cm of ice is already formed. (b) Calculate the total time taken in forming 10cm of ice. Assume that the temperature of the entire water reaches 0^(@)C before the ice starts forming. Density of water =1000kgm^(-3) , latent heat of fusion of ice =3.36xx10^(5)Jkg^(-1) and thermal conductivity of ice =1.7Wm^(-1)C^(-1) . Neglect the expansion of water on freezing.

The external length, breadth and height of a closed rectangular wooden box are 18cm, 10cm and 6cm respectively and thickness of wood is 1/2 cm. When the box is empty, it weight 15kg and when filled with sand it weighs 100kg. Find the weight of one cubic cm of weed and cubic cm of sand.

The floor of a rectangular pool is 5.4 m by 4m. In all parts of the pool the water is 40 cm deep . Find the volume of the water in the pool.

A block of wood of volume 25cm^(3) floats on water with 20cm^(3) of its volume immersed. Calculate (i) the density, and (ii) the weight of block of wood.

A block of wood of volume 30 "cm"^3 floats in water with 20 "cm"^3 of its volume immersed. Calculate the weight of the block of wood .