Question
‘X’ can complete a job in 30 days. ‘Y’ is 50%
more efficient than ‘X’. How long will they take to finish 75% of the work together?Solution
Let work = 30x units (since X takes 30 days).
Efficiency of X = 30x / 30 = 1x unit/day.
Y is 50% more efficient, so Y's efficiency = 1x + 0.5x = 1.5x units/day.
75% of work = 30x × 0.75 = 22.5x units.
Combined efficiency = 1x + 1.5x = 2.5x units/day.
Time taken = 22.5x / 2.5x = 9 days.
In each of the questions below are given some statements followed by two conclusions. You have to take the given statements to be true even if they see...
Statement:  J > K ≥ C = D ≤ Y < Z
Conclusions:
I. Z > C
II. J ≥ Y
III. J > D
IV. C > Z
...In the following question the relationship between different elements is given in the statements followed by three conclusions I, II and III. Read the ...
Statement: H > G = M > S; GÂ `>=` Â T > L; MÂ `<=` Â F <Â Â U
Conclusion: Â I. F > SÂ Â Â Â Â Â Â Â Â Â Â II. T < H
...Statements:Â Â Â Â Â Â T @ V % Z #Â C & B $ SÂ # E; W $ Z @ C
Conclusions :Â Â Â Â Â I. E @ ZÂ Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â II. S # WÂ Â Â ...
Statements: B ≥ C > D; B < E > J; G > A ≥ H > J
Conclusion:
I. D ≤ A
II. G > C
Statements: Q © E, S % C, E $ S, C @ AÂ
Conclusions:Â
I. A © CÂ
II. S % AÂ
III. C © Q
Statement: L ≥ M ≤ R = S; M > N ≥ P
Conclusions: I. P ≤ M II. L > N
Statements:
A ≥ T > I, D > I, U = P ≥ I
Conclusions:
I. U > D
II. A > I
Statements: B @ E, E $ Y, Y & I, I % C
Conclusions: I. E @ IÂ Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â II. C & B
...
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