20 men can finish a work in 30 days. on completion of 10 days, 10 men leave work. remaining men work for next 10 days. at the end of 20 days it is decided to complete the work in remaining 10 days. how many extra men are required
Answers
Answered by
6
20*30=600 work days
20*10-200 work days completed
600-200=400 more work days
10*10=100 work days completed in 10 more days
400-100=300 more work days to complete the job
300 worker days/10 days=30 workers needed to finish the job in 10 more days
Add 20 more workers.
20*10-200 work days completed
600-200=400 more work days
10*10=100 work days completed in 10 more days
400-100=300 more work days to complete the job
300 worker days/10 days=30 workers needed to finish the job in 10 more days
Add 20 more workers.
Answered by
3
Answer: 20 men
Step-by-step explanation
Total work unit=20*30=600
Here 20 men work for 10 days
Then,
Remaining men after 10 days=20-10=10 men
Let, men=M
We know,
Total work=men*days
ATQ,
20men*10 days+10men*10 days+10days*M=600
=200+100+10M=600
=300+10M=600
=10M=300
=M=300/10=30 men
Additional men required=30-10=20 men
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