Question

Twelve men can complete a work in $8$ days. Three days after started the work, $3$ more men joined them. In how many days will all of them together complete the remaining work ?

• A. $2$ day
• B. $4$ day
• C. $5$ day
• D. $6$ day

Answer 1

Answer: (B)

$4$ day

Total work $=12\times 8=96$

Let the remaining work completes in $x$ days

So, $12\times 3+15\times x=96$

$15x=96-36$

$x=\frac{60}{15}=4$ days.