जॉइन Examsbookउत्तर : 2. "17.5 days"
9 girls working 7 hours a day can complete a piece of work in 15 day. In how many days can 6 girls working for 9 hours a day, complete the same piece of work?5
प्र: 9 girls working 7 hours a day can complete a piece of work in 15 day. In how many days can 6 girls working for 9 hours a day, complete the same piece of work?
- 135/4 daysfalse
- 217.5 daystrue
- 319 3/4 daysfalse
- 437/3 daysfalse
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उत्तर : 2. "17.5 days"
व्याख्या :
Answer: B) 17.5 days Explanation: Let the number of days be 'p' As the work is same, we know that M1 x D1 x H1 = M2 x D2 x H2 Where M = Men, D = Days, H = Hours per day Here M1 = 9, D1 = 15, H1 = 7 M2 = 6, D2 = p, H2 = 9 => 9 x 15 x 7 = 6 x p x 9 => p = 35/2 = 17.5 days.