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Grade 12th pass8 grade maths

2 men each working 5 hour per day can finish a job in 12 days. How long will 4 men each working 2 hours per day take to finish the same job?

Profile image of Harshit Singh
4 Years agoGrade 12th pass
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1 Answer

Profile image of Jigyanshu Dixit
3 Years ago
let the number of days be x. The ratio of number of days=12:x Number of days it takes is inversely proportional to the number of hours each man works per day and the number of men at work. ∴ 12 : x = 4 × 2 : 2 × 5 ∴12:x=4×2:2×5 ⇒ 12 x = 8 10 ⇒ x = 10 × 12 8 = 15 ⇒12x=810⇒x=10×128=15 days ∴ ∴ 4 men each working 2 hours per day can finish the job in 15 days

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