G can do a piece of work in 40 days and H can do the same in 10 days- But they were working together and completed the work in 20 days- which of the following can be the reason-A- Only G-s efficiency got reduced by 40 -B- Only H-s efficiency got reduced by 75 -C- Only G-s efficiency got reduced by 75 -D- Only H-s efficiency got reduced by 45 -E- Only H-s efficiency got reduced by 40 -

The correct option is B Only H’s efficiency got reduced by 75 If H’s efficiency reduced by 75 ...

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Quantitative Aptitude

Time & Work

G can do a pi...

Question

G can do a piece of work in 40 days and H can do the same in 10 days. But they were working together and completed the work in 20 days, which of the following can be the reason?

Only H’s efficiency got reduced by 40%

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Only G’s efficiency got reduced by 40%

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Only H’s efficiency got reduced by 75%

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Only G’s efficiency got reduced by 75%

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Only H’s efficiency got reduced by 45%

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Solution

The correct option is C
Only H’s efficiency got reduced by 75%

If H’s efficiency reduced by 75%

Work done by H in one day = $\frac{1}{40}$

If G and H work together

The work done in one day= $\frac{1}{40} + \frac{1}{40} = \frac{1}{20}$

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G can do a piece of work in 40 days and H can do the same in 10 days. But they were working together and completed the work in 20 days, which of the following can be the reason?

The correct option is C Only H’s efficiency got reduced by 75% If H’s efficiency reduced by 75% Work done by H in one day =140 If G and H work together The work done in one day=140+140=120

The correct option is C
Only H’s efficiency got reduced by 75%

If H’s efficiency reduced by 75%

Work done by H in one day = $\frac{1}{40}$

If G and H work together

The work done in one day= $\frac{1}{40} + \frac{1}{40} = \frac{1}{20}$