1.

1). 28 days2). 30 days3). 15 days4). 10 days

Answer»

Suppose Shashi takes K days to do the work.

∴ Sachin takes $(\LEFT( {2 \times \frac{3}{4}K} \RIGHT) = \frac{3}{2}K)$ days to do it

From question,

⇒ (Shashi + Sachin)’s ONE DAY’s work $(= \frac{1}{{18}})$

∴ $(\frac{1}{K} + \frac{2}{{3K}} = \frac{1}{{18}})$

Or K = 30

So shashi can do the same work in 30 days.



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