A and B takes 9 days and 16 days more for doing a piece of work respectively than the time taken by A and B together. In how many days will they finish the work together? |
12 15 25 18 |
12 |
In these type of questions: Use direct formula : (A + B)'s time = \(\sqrt {More\;time\;taken\;by\;A\;×\;More\;time\;taken\;by\;B}\) Hence, Using direct formula, A + B will take = \(\sqrt {9\;×\;16}\) = 3 x 4 = 12 days to complete the work
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