Carpenter 'A' can make a table in 5hours while carpenter 'B' takes 6hours to make a table. Working together, how long will 'A' and 'B' take to make 11 tables ?
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Step-by-step explanation:
A can make a table in 5 hours.
Therefore, Work done by A in 1 hour is 1/5( applying unitary method)
Similarly, Work done by B in 1 hour is 1/6
Together, Work done by both A and B in 1 hour will be
1/5+1/6 = 11/30
Therefore, Time taken by both to finish 1 table is 30/11 hours
And to finish 11 tables, Time taken =30/11×11 =30
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