A man completes $\frac{3}{8}$ of a job in $12$ days. At this rate, how many more days will he take to finish the job?

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Solution

The correct option is B $20$
$\frac{3}{8}$ part is done in $12$ days.
$∴ 1$ complete part is done in $\frac{12}{3 / 8} = 32$ days.
Remaining work $= 1 - \frac{3}{8} = \frac{5}{8}$
So, remaining $\frac{5}{8}$ part is done in $32 - 12 = 20$ days.

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A man completes 38 of a job in 12 days. At this rate, how many more days will he take to finish the job?

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A man completes $\frac{3}{8}$ of a job in $12$ days. At this rate, how many more days will he take to finish the job?

The correct option is B $20$
$\frac{3}{8}$ part is done in $12$ days.
$∴ 1$ complete part is done in $\frac{12}{3 / 8} = 32$ days.
Remaining work $= 1 - \frac{3}{8} = \frac{5}{8}$
So, remaining $\frac{5}{8}$ part is done in $32 - 12 = 20$ days.