Question

1. A, B and C can do a work individually in 20,30 and 40 days respectively. They together finished the work
If A earned Rs. 26.000 how much did B earn?
(a) 12000
(b) 8000
(c) 6000
(d) 6500
(e) None of these
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Answer 1

Answer:

a earned 26,000 so for a single day he earns 1300 therefore 1300*30 gives us 39000 which isn't one of the answers so none of the above is the answer