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An elephant can do a work as fast as two horses lsquo;Arsquo; and lsquo;Brsquo; can do it by working together. If horse lsquo;Arsquo; alone can complete the work in 24 hours and horse lsquo;Brsquo; in 36 hours, then find the time taken by elephant to complete the work.

A 13.2 hours

B 11.2 hours

C 12.2 hours

D 13.2 hours

E None of these

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