1.

1). 24 hours2). \(17\frac{1}{7}{\rm{ \;hours}}\)3). 40 hours4). Can’t be determined

Answer»

LET a and B be the NUMBER of hours required by Pascal and RASCAL to complete the job individually.

∴ According to the given conditions,

1/a + 1/b = 1/10- - - - - - (1)

And, 2.5/a + 8.5/b = 1/2- - - - - - (2)

On solving equations (1) and (2) SIMULTANEOUSLY, we get,

⇒ a = 120/7 and b = 24

∴ Pascal can complete the whole work in 120/7 hours.



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