If 10 persons can complete (2/5)th of a work in 8 days, then how many persons are required to complete the remaining work in 12 days ?यदि 10 व्यक्ति किसी कार्य का (2/5) वाँ भाग करने में 8 दिन लगाते हैं, तो उसी कार्य के शेष कार्य को 12 दिनों में पूर्ण करने के लिए कितने व्यक्तियों की आवश्यकता होगी ?
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Correct answer: C. 10
Explanation
10 persons x 8 days = 80 man-days for 2/5 of the work, so the whole work is 200 man-days. The remaining work is 3/5, i.e. 120 man-days. Persons needed in 12 days = 120 / 12 = 10. Hence the answer is 10.कार्य के 2/5 भाग के लिए 10 x 8 = 80 व्यक्ति-दिन लगते हैं, अतः पूरा कार्य 200 व्यक्ति-दिन का है। शेष कार्य 3/5 अर्थात 120 व्यक्ति-दिन का है। 12 दिनों में आवश्यक व्यक्ति = 120 / 12 = 10। अतः उत्तर 10 है।More Mathematics & Numerical Ability questions
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