1.

Working 5 hours a day, A can complete a piece of work in 8 days and working 6 hours a day B can complete the same work in 10 days. Working 8 hours a day both of them can complete the work in ____.1). 3 days2). 4 days3). 4.5 days4). 5.4 days

Answer»

GIVEN,

A can complete the WORK in hours = 5 × 8 = 40 hours

B can complete the work in hours = 6 × 10 = 60 hours

A's 1 HOUR's work = 1/40

B's 1 hour's work = 1/60

(A + B)’s 1 hour's work = (1/40) + (1/60) = 1/24

Both will finish work in 24 DAYS.

Number of days of 8 hours a day = 24 × 1/8 = 3

∴ They require 3 days to complete the work.


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