30 men working 5 hours a day can complete a work in 16 days. In how many days can 20 men
working 6 hours a day complete the same work?
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Answer:
30 men : 5 hours a day : 16 days (Given)
Find 1 man:
30 men : 5 hours a day : 16 days
30 ÷ 30 : man 5 hours a day : 16 x 30 days
1 man : 5 hours a day : 480 days
Find 20 men:
1 man : 5 hours a day : 480 days
1 x 20 men : 5 hours a day : 480 ÷ 20 days
20 men : 5 hours a day : 24 days
Find 1 hour a day:
20 men : 5 hours a day : 24 days
20 men : 5 ÷ 5 hours a day : 24 x 5 days
20 men : 1 hour a day : 120 days
Find 6 hours a day:
20 men : 1 hour a day : 120 days
20 men : 1 x 6 hour a day : 120 ÷ 6 days
20 men : 6 hour a day : 20 days
Answer: 20 days
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