There are a total of 62 students in the robotics club and the science club. The science club has 8 fewer students than the robot
1 answer:
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Answer: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