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