A U-tube contains mercury

PHYSICS · Single correct · CBSE · Physics · Gravitation · Gravitation

Problem

A U-tube contains mercury. The left limb has

20\,\text{cm}

of water above the mercury, while the right limb has a column of oil (density

800\,\text{kg\,m}^{-3}

) of unknown height

x

. The mercury level in the right limb is observed to be

1\,\text{cm}

higher than in the left limb. Calculate the height

x

of the oil column. (a)

10\,\text{cm}

(b)

8\,\text{cm}

(c)

12\,\text{cm}

(d)

5\,\text{cm}