1.

1). 582). 603). 554). 66

Answer»

Rahi is 30% less EFFICIENT than Tanu.

Tanu TAKES 99 days to COMPLETE a work.

NUMBER of days TAKEN by Rahi to finish a work = $(\frac{{99}}{{100 - 30}} \times 100 = \frac{{990}}{7}\;days)$

In one day, together they do = $(\frac{1}{{99}} + \frac{7}{{990}} = \frac{{17}}{{990}})$

∴ Time taken to do complete work = 990/17 ≈ 58 days



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