Question
‘P’ takes 25 days to complete a piece of work. ‘Q’
is 25% more efficient than ‘P’. Find the time taken by them to complete 90% of the work together.Solution
Let the total work be 100x units.
Efficiency of P = 100x / 25 = 4x units/day.
Q is 25% more efficient than P.
So, Q's efficiency = 4x + (25% of 4x) = 4x + x = 5x units/day.
90% of work = 100x × 0.90 = 90x units.
Combined efficiency (P + Q) = 4x + 5x = 9x units/day.
Time taken = 90x / 9x = 10 days.
More Time and work Questions
- Find the wrong number in the given number series.
5, 10, 20, 35, 80, 160 - Find the wrong number in the given number series.
2, 10, 12, 36, 38, 34 Find the wrong number in the given number series.
30, 17, 19, 30.5, 64, 164.5
121 127 133 142 160 206
...6.5, 11, 22, 25.5, 51, 54.5
- Find the wrong number in the given number series.
25, 36, 29, 40, 33, 50 123, 155, 198, 246, 301, 363
14, 16, 22, 46, 172, 886
12, 18, 40, 90, 270, 945
Find the wrong number, in the given number series,
1680, 840, 2520, 630, 3150, 475
Relevant for Exams:
