Question
A builder employed 12 workers to complete a job in 18 days.
But after 8 days, 4 workers quit. How many more days will be required to complete the remaining work?Solution
ATQ,
Let the efficiency of each worker be 'e' units/day.
So, total work = 12 × 18 × e = 216e units
And work done in first 8 days = 12 × 8 × e = 96e units
So, work left = 216e - 96e = 120e units
Now, remaining workers = 12 - 4 = 8
So, time needed = 120e ÷ (8 × e) = 15 days
Additional days = 15 - 10 = 5 days
For 3x² − 10x − 8 = 0, find (1/α + 1/β).
In the question, two equations I and II are given. You have to solve both the equations to establish the correct relation between x and y.
I. 3x<...
I. 2x2 - 9 x + 9 = 0Â
II. 2y2 - 7 y + 3 = 0
I. 8x² - 74x + 165 = 0
II. 15y² - 38y + 24 = 0
I. 3x2 - 16x - 12 = 0
II. 2y2 + 11y + 9 = 0
In the question, two equations I and II are given. You have to solve both the equations to establish the correct relation between 'p' and 'q' and choose...
For what values of k does the equation x² – (k+1)x + k = 0 have two distinct real roots, both greater than 1?
l. x2 - 16x + 64 = 0
II. y2Â = 64
I. 66x² - 49x + 9 = 0
II. 46y² - 37y - 30 = 0
I. 3p² - 17p + 22 = 0
II. 5q² - 21q + 22 = 0
Relevant for Exams:
