Question

A can do a piece of work in 14 days and B can do it in 21 days. They work together for 7 days and then
A leaves. How long will B take to complete the remaining work?




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Answer 1

$\huge \underline \frak \pink {★彡A᭄ɴsᴡᴇʀ彡★}$

Given :-

A - 14 Days

B - 21 Days

Work Together - 7 Days

Solution :-

A's 1 Day Work - 1/14

B's 1 Day Work - 1/21

Together -

$( \frac{1}{14} + \frac{1}{21} ) \times 7$

$\frac{3 + 2}{42} \times 7$

$\frac{5}{6}$

Left work - 1/6

Now B 21 Days

So , 1/6 × 21

7/2 Days

3.5 Days

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Answer 2

Given :-

A - 14 Days

B - 21 Days

Work Together - 7 Days

Solution :-

A's 1 Day Work - 1/14

B's 1 Day Work - 1/21

Together -

Left work - 1/6

Now B 21 Days

So , 1/6 × 21

7/2 Days

3.5 Days