Pumps a, b, and c operate at their respective constant rates. pumps a and b, operating simultaneously, can fill a certain tank in 6/5 hours; pumps a and c, operating simultaneously, can fill the tank in 3/2 hours; and pumps b and c, operating simultaneously, can fill the tank in 2 hours. how many hours does it take pumps a, b, and c, operating simultaneously, to fill the tank.

a. 1/3
b. 1/2
c. 1/4
d. 1
e. 5/6

D) 1 hr

Step-by-step explanation:

Given

Pump A and B can fill tank in

Pump A and C can fill tank in

Pump B and C can fill tank in

Let A be the total hr taken A therefore rate of

Let B be the total hr taken B therefore rate of

Let C be the total hr taken C therefore rate of

-----1

-----2

-----3

Adding 1,2 & 3

thus time taken by A,B and C combined is 1 hr

6e14 is the answer.

well what did you do it matters what you did : )

step-by-step explanation: