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Let the total work = 54 units Efficiency of horse who can complete the work in 18 hours = 54/18 = 3 units/hour Efficiency of horse who can complete the work in 27 hours = 54/27 = 2 units/hour Therefore, time taken by both horses to complete the work together = 54/(3 + 2) = 10.8 hours Therefore, time taken by the elephant to complete the work = 10.8 hours
NBPGR is located at
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