Two persons A and B working separately can sanitise a buildi

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Two persons A and B working separately can sanitise a building in 6 and 10 hours, respectively. They work in stretches of one hour alternately. If A begins at 8 a.m., then when will the work be finished?

[SSC CGL 13th Dec 2022 Shift-3 With Answers]

A

B

C

D

EXPLANATION

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