Question

J. The dimensions of a field are 15 m by 12 m. A pit 5 m long, 4 m wide and 2 m deep is dug
in one corner of the field and the earth removed is spread over the remaining area of the
field. Calculate by how much is the level of the field raised?​

Answer 1

Step-by-step explanation:

Why should curd and sour substances not be kept in brass or copper vessels? Both the Curd and sour substances are acids. Acids react with metals to produce salt and hydrogen gas. So, if such substances are kept in a copper container, the acid will react and the container will be corroded.