How can you find relatve density of a liquid ?

Explanation

Aim : To find the relative density of a liquid.
Materials required : Small bottle of 50 ml capacity (the bottle should weigh not less than 10 gm), spring balance, any liquid (milk or oil or kerosene) about 50 ml.
Procedure :
1. Find thej weight of emty 50 ml bottle.
2. Fill the bottle with water and weigh it.
3. Find the weight of 50 ml water.
4. Remove water from the bottle and fill it with any liquid (say milk).
5. Weight the bottle with liquid.
6. Weight of 50 ml liquid = Weight of bottle with liquid-Weight of empty bottle
7. `"Relative density of liquid"=("Weight of the liquid")/("Weight of same volume of water")`