WBCS 2021 Mains (General Studies Paper-IV) Prev. Yr. Paper (24-May-2022)

The average of first $10$ natural numbers is

A room is $26\text{ feet}$ long and $10\text{ feet}$ wide. If its floor is to be covered by square tiles, how many minimum number of tiles will be required?

A single person takes $6\text{ minutes}$ to fill a bottle. If from $11\text{ am}$ to $12.30\text{ pm}$ $1845$ bottles are to be filled, how many persons should be employed on this job?

Sanjeev walks $10\text{ metres}$ towards the south. Turning to left, he walks $20\text{ metres}$ and then moved to right. After moving a distance of $20\text{ metres}$, he turns to the right and walks another $20\text{ metres}$. Finally, he again turns to the right and moves a distance of $10\text{ metres}$. How far and in which direction is he from the starting point?

The distance between the centres of two circles of radii $1\text{ cm}$ and $7\text{ cm}$ is $10\text{ cm}$. The length of direct tangent (in $\text{cm}$) is