alleryयदि 6 पुरुष किसी कार्य को 10 दिनों में पूरा करते हैं, तो उसी दर से 4 पुरुष कितने दिनों में पूरा करेंगे?
A15 दिन
B12 दिन
C16 दिन
D20 दिन
Answer & Solution
Correct answer: A. 15 दिन
1. पुरुष और दिन व्युत्क्रमानुपाती होते हैं, इसलिए उनका गुणनफल कुल कार्य होता है।
2. यहाँ कुल कार्य 6 x 10 = 60 मैन-डे (पुरुष-दिन) है।
3. 4 पुरुषों के साथ, आवश्यक दिन 60 / 4 होंगे।
4. अर्थात 15 दिन।
5. कम पुरुषों का अर्थ अधिक दिन होगा, अतः 10 से कम का कोई भी उत्तर देखते ही गलत होगा।
_Source: syllabus Maths, Ch 11 'Direct and Inverse Proportions', S11.3 Inverse Proportion_
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