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A certain number of persons can complete...

A certain number of persons can complete a work in 34 days working 9 hours a day. If the number of persons is decreased by 40%, then how many hours a day should the remaining persons work to complete the work in 51 days ?
कुछ व्यक्ति किसी कार्य को एक दिन में 9 घंटे कार्य करते हुए 34 दिनों में पूरा कर सकते हैं | यदि व्यक्तियों की संख्या 40% से कम कर दी जाए, तो शेष व्यक्तियों को इस कार्य को 51 दिनों में पूरा करने के लिए दिन में कितने घंटे कार्य करना पड़ेगा ?

A

a)9

B

b)30

C

c)12

D

d)10

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PINNACLE-WORK AND TIME-EXERCISE
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  12. The efficiences of A , B and C are in ratio 5 : 3 : 8. Working togethe...

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  13. To do a certain work, the ratio of the efficiencies of A , B and C is ...

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  14. The ratio of efficiencies of A , B and C is 3 : 5 : 1. Working togethe...

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  15. The ratio of the efficiencies of A, B and C to do a certain work is 7:...

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