40 persons can repaira bridge in 12 days. If 8 more persons join them, then in how many days bridge can be repaired?
Show answer & explanation
Correct answer: B
Explanation
The correct answer is option 2 i.e. 10 days.
| Understanding/Application |
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We know that M1D1 = M2D2 where M and D are Number of men and Number of days respectively. M1 = 40 D1 = 12 M2 = 40 + 8 = 48 |
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M1D1 = M2D2 40(12) = 48(D2) D2 = 10 days |