Mathematics · Time and Work
पाइप P और पाइप Q एक टैंक को क्रमशः 5 घंटे और 15 घंटे में भर सकते हैं। पाइप R उसी टैंक को 7.5 घंटे में खाली कर सकता है। पूरी तरह से खाली टैंक को भरने में तीनों पाइप मिलकर कितना समय लेंगे?
- 17.5 घंटे✓
- 23.5 घंटे
- 312.5 घंटे
- 42.5 घंटे
सही उत्तर देखें
7.5 घंटे
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