alleryएक पाईप एकटा एक टाकी 15 मिनिटांत भरतो; दुसऱ्या पाईपसह त्याला 6 मिनिटे लागतात. दुसऱ्या पाईपाला एकट्याला लागणारा वेळ:
A10 मिनिटे
B12 मिनिटे
C8 मिनिटे
D9 मिनिटे
Answer & Solution
Correct answer: A. 10 मिनिटे
दुसऱ्या पाईपचा दर 1/6 - 1/15 = 3/30 = 1/10 आहे, म्हणून 10 मिनिटे.
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