A and b can do a piece of work in 40 days while c & a can do it in 60 days. if b is twice as good as c then c alone will do the work in how many days? 1. 120 days 2. 100 days 3. 80 days 4. 24 days
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The amount of work done by A and B together in one day is
1/a +1/b = 1/40
similarly, 1/c + 1/a = 1/60
Since B is twice good then C, the work done by B in one day be
1/b = 2/c
using the above equations you can calculate value for C
1/a +1/b = 1/40
similarly, 1/c + 1/a = 1/60
Since B is twice good then C, the work done by B in one day be
1/b = 2/c
using the above equations you can calculate value for C
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