Question
Efficiency of A is 25% more than B and B takes 30 days
to complete a piece of work. A started the work alone and then B joined him 4 days before actual completion of the work. For how many days A worked alone?Solution
Efficiency Ratio = A : B = 125 : 100 = 5 : 4 Days Ratio = A : B = 4 : 5 B takes 30 days to complete a piece of work. => 5’s = 30 => 1’s = 6 => 6’s = 24 So A can complete the work in 24 days. Total units of work = 120 (LCM of 24,30) A = 5 unit B = 4 unit A and B worked for 4 days = 4 × (5+4) = 36 units Remaining work = 120 – 36 = 84 units Hence, A worked alone for = 84/5 days.
A sequence {Sₙ} is defined by:
Condition I: S₁ = 3 and for all n ≥ 2, Sₙ = 2·Sₙ₋₁ + (−1)ⁿ.
Condition II: The second ter...
27 44 63 86 ? 146
6 16 116 566 2272 6814
11 a�...
100, 110, ?, 171.6, 240.24, 360.36
31 16.5 18 �...
104 136 152 160 164 ?
...30 32 67 206 ? 4166
625, 5, 125, 25, 25, ? , 5
16 4 2 1.5 1 1.875
...130 155 146 195 186 ?
...
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