A pressure gage connected to a tank reads 55 kPa at a location where the atmospheric pressure is 72.1 cmHg. The density of mercury is 13,600 kg/m³. The absolute pressure in the tank is A)41 kPa B) 56 kPa C)82 kPa D)246 kPa E) 151 kPa**

Question

Quizplus · Accepted Answer

Solved by EES Software. Solutions can be verified by copying-and-pasting the following lines on a blank EES screen. 
rho=13600 "kg/m^3"
g=9.81 "m/s2"
h=0.721 "m"
Pgage=55 "kPa"
Patm=rho*g*h/1000 "kPa"
Pabs=Pgage+Patm "kPa"
"Some Wrong Solutions with Common Mistakes:"
 W1=Patm-Pgage "taking the difference"
W2=Pgage+h "using h instead of Patm"

A Pressure Gage Connected to a Tank Reads 55 KPa