Question
‘M’ and ‘N’ together can do a work in 20 days.
If ‘M’ increases his efficiency by 25% while ‘N’ decreases his efficiency by 50%, then the time taken to complete the work remains unchanged. Find the ratio of efficiencies of ‘M’ and ‘N’, respectively.Solution
Let the efficiency of ‘M’ and ‘N’ be ‘x’ units/day and ‘y’ units/day, respectively. So, total work = {(x + y) × 20} units After change in efficiencies, Also, total work = (1.25x + 0.5y) × 20 So,
1.25x + 0.5y = x + y Or,
0.25x = 0.5y Or,
x : y = 2 : 1 So, ratio of efficiency of ‘M’ and ‘N’ = 2 : 1
In the question, assuming the given statements to be true, find which of the conclusion (s) among given three conclusions is /are definitely true and t...
In the question, assuming the given statements to be true, find which of the conclusion (s) among given three conclusions is /are definitely true and t...
Statements: Z % Y; X # W; U % V; W & V; Y @ X
Conclusions:Â Â Â Â Â
I. U @ X Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â ...
Statements: Â Y $ Z, H $ D, Z * D
Conclusions: Â Â Â Â a) Y & HÂ Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â b) Y * D
...In the question, assuming the given statements to be true, find which of the conclusion (s) among given three conclusions is /are definitely true and t...
In the question, assuming the given statements to be true, find which of the conclusion (s) among given two conclusions is /are definitely true and the...
Statements:
L ≥ M = N < P; O < Q ≥ R =S ≥ L
Conclusions:
I). Q > M
II). Q = N
Statement: F < G < H ≥ J; F ≥ K > L
Conclusion:
I. H > L
II. H = L
Statement: X > W = P; X > G > F; X < O
Conclusion: I. F < W      II. P ≤ F
Statements: J < K; L = M; K >N ≥ L
Conclusions:
I. J < L
II. N = M
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