Speed of boat A is 50% more than speed of boat B in still water, if both boats start in a lake at same time from point P downstream at the same time and reach point Q, which is 72 km away from point P at the same time. Boat A lost 120 minutes during journey because of engine did not work properly, find time taken by boat A to cover given distance in upstream with the 50% of its speed? नाव A की गति शांत जल में नाव B की गति से 50% अधिक है, यदि दोनों नाव एक झील में एक ही समय में एक बिंदु P से अनुप्रवाह से शुरू होती हैं और बिंदु Q तक पहुंचती हैं, जो एक ही समय पर बिंदु P से 72 किमी दूर है। नाव A यात्रा के दौरान 120 मिनट खराब कर देता है क्योंकि इंजन ठीक से काम नहीं कर रहा था, तो नाव A द्वारा दी गई दूरी को अपनी गति के 50% के साथ धारा की विपरीत दिशा में तय करने में लगा समय ज्ञात कीजिए?
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