A U tube manometer containing mercury has a right limb open to the atmosphere and the

left limb connected to a pipe conveying of water under pressure. The difference in level

of mercury in the two limbs being $200$ mm$.$ If the mercury level in the left limb is $400$

mm below the centerline of the pipe. Find the absolute pressure in the pipe in kPa.

Assume normal atmospheric pressure at sea level is $101$ kPa