Question

18 people complete work in 12 days. They work for 6 days. After that 4 people added. So now time taken to complete the remaining work is -​

Answer 1

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let 1 men does 1 unit of work per day

Total work: 18×12=216 units

6 days work of 18 men

=18×6=108 units.

work lelt =216- 108=108 units

After 6 days 4 men jøin. so total men is 22 men (18+4) they will do 22 unit of work per day

Now,

remaining work completed in

$\sf= \frac{108}{22} \\ \\ \sf= 4\: days$