Bihar Police Constable practice question
Arjun can complete a piece of work in 12 days and Aman can complete the same work in 18 days. Working together, in how many days will they complete the work?
From a Bihar Police Constable Reasoning practice set · Reasoning
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Correct answer: (D) 7.2 days
Arjun's 1-day work = 1/12; Aman's 1-day work = 1/18. Together, 1-day work = 1/12 + 1/18 = 36/5. So time taken = 5/36 = 7.2 days.
हिंदी में प्रश्न
Arjun एक काम को 12 दिनों में पूरा कर सकता है और Aman उसी काम को 18 दिनों में पूरा कर सकता है। दोनों मिलकर काम करें तो वे काम कितने दिनों में पूरा करेंगे?
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सही उत्तर: (D) 7.2 days
Arjun का 1 दिन का काम = 1/12; Aman का 1 दिन का काम = 1/18। दोनों मिलकर 1 दिन का काम = 1/12 + 1/18 = 36/5। अतः समय = 5/36 = 7.2 days।
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