Question

the cost of 7 2/3 metres of cloth is 12 3/4 rupees find the cost of one metre​

Answer 1

Answer:

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Step-by-step explanation:

The attached image is the solution

Answer 2

Step-by-step explanation:

[9/16, 6:34 AM] H.Ramesht: What is primary key ?

A primary key is a column or a set of columns in a table whose values uniquely identify a row in the table.

What is foreign key ?

... A foreign key is a column or a set of columns in a table whose values correspond to the values of the primary key in another table.

[9/16, 6:54 AM] H.Ramesht: What is candidate key ?

Candidate Key is a super key with no repeated attributes.

What is alternate key ?

Alternate Key – is a column or group of columns in a table that uniquely identify every row in that table. ...