Question

The liquids shown in fig. in the two arms are mercury (specific gravity $=13.6$) and water. If the difference of heights of the mercury columns is $2cm$, find the height h of the water column.

• A. $27cm$
• B. $30cm$
• C. $35cm$
• D. $440cm$

Answer 1

The correct option is A $27cm$

As, we know that pressure at same level in same medium are same,
So,
Pressure at $A=$pressure at B
$f_{w}gh=f_{max}gH[H=2cm]$
$h=13.6\times 2cm$
$h=27.2cm$
$h\approx 27cm$