Question
A is thrice as efficient as B and can finish a piece of
work in 20 days less than B. B can finish this work in how many days?Solution
Ratio of efficiency of A and B = 3: 1
A will take 1/3 of time as compared to B.
Say, B takes 3x days and A takes x days.
∴ 3x – x = 20 ⇒ x = 10
∴ B takes 10 × 3 = 30 days to do the work.
More Time and work Questions
What will come in place of the question mark (?) in the following series?
24, 8, 15, ?, 12, 4
56, 27, 14.5, 6.25, ?, 1.0625
945, 1890, ?, 504, 144, 32
12 17 44 147 ? 3065 18420
...257, 399, 566, ?, 983, 1237
What will come in place of (?) Question mark in the given number series.
500, 489, 467, 434, 390, 335, ?
11 16 42 141 ? 2945 17700
...37, 49, 63, ?, 97, 117
Choose the missing term.
R, U, X, A, D,?
380, ?, 360, 324, 260, 160
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