When was India's capital shifted from Calcutta to Delhi?

One of the roots of the equation is $x^2-4x+k=0$ is $x=3.$ Find the other root?

The given symbol stands for a/an _____ in an electric circuit.

Consider the given statements as true and decide which of the given conclusion can definitely be drawn from the given statements.

Statements:
All studious students pass in exam.
All studious students sleep well.

Conclusions:
1. All who sleep well are studious students.
2. All who pass the exam sleep well.

The speed of sound in air at $0^o$ is :

Consider the given argument and decide which of the given assumption(s) is(are) implicit.

Argument:
During an election, the opposition party said, "look at the price rise in the last five years".

Assumptions:
1. This time, give a chance to our party for power.
2. Prices will rise if you choose the same party to be in power.