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Quantitative Aptitude

Time & Work

Q4 A contract...

Question

Q4) A contractor employs 280 men to complete a work in 10 days. But after 3 days, it was found that only 1/4^thof the work was done. How many additional men are required to finish the work on time?

(a) 360

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(b) 120

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(d) 80

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Solution

The correct option is D (d) 80
Ans:4)(d)Sol:
Given, (280 ×m ×3) = (1/4)W;
Let, 'n' is the new number of men.
(n × m × 7) = (2/4)W;
(280 ×m ×3)/ (n × m × 7) =(1/4)/(3/4)
n=360;
Additional number of men= 80

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Q4) A contractor employs 280 men to complete a work in 10 days. But after 3 days, it was found that only 1/4th of the work was done. How many additional men are required to finish the work on time?

The correct option is D (d) 80Ans:4)(d)Sol: Given, (280 ×m ×3) = (1/4)W; Let, 'n' is the new number of men. (n × m × 7) = (2/4)W; (280 ×m ×3)/ (n × m × 7) =(1/4)/(3/4) n=360; Additional number of men= 80

Q4) A contractor employs 280 men to complete a work in 10 days. But after 3 days, it was found that only 1/4^thof the work was done. How many additional men are required to finish the work on time?

The correct option is D (d) 80
Ans:4)(d)Sol:
Given, (280 ×m ×3) = (1/4)W;
Let, 'n' is the new number of men.
(n × m × 7) = (2/4)W;
(280 ×m ×3)/ (n × m × 7) =(1/4)/(3/4)
n=360;
Additional number of men= 80