- #1
Girn261
Homework Statement
A fuel oil supply system consists of two tanks (Tank A and Tank B) and two transfer pumps (Pump A and Pump B) to supply a Bunker C fuel oil to a heating boiler.
Pump A can fill up a Tank A from the minimum level in 15 hours and 20 minutes
Pump B can fill up a Tank B from the minimum level in 17 hours and 30 minutes
Calculate the time to fill up Tank A from the minimum level under the following conditions.
a) both pumps are used simultaneously
b) pump A is used to fill up Tank A while Pump B is transferring fuel out from Tank A to Tank B
Homework Equations
The Attempt at a Solution
for part a) I converted the hours to minutes for both pumps, I assume both tanks to be same size. Pump A = 920mins to fill tank & 1050 mins for pump B. Then I did (1/920+1/1050)x(t)=1 to find t which was 490 mins. But for part B any tips? I'm having a brain fart.