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Data Interpretation

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Read the Question carefully and choose the correct option.
On Friday, if the ratio of speed of boat to speed of stream is 2 : 1, then what is the difference between the time taken by the boat to go upstream and to go downstream ?

(1) 36 hours
(2) 42 hours
(3) 45 hours
(4) 35 hours

शुक्रवार को, यदि नाव की गति और धारा की गति का अनुपात 2:1 है, तो नाव द्वारा धारा के प्रतिकूल जाने और धारा के अनुकूल जाने में लिए गए समय के बीच क्या अंतर है?

(1) 36 घंटे
(2) 42 घंटे
(3) 45 घंटे
(4) 35 घंटे
This Question came in
UGC-NET-Linguistics-14-December-2023-Shift-1-Q4
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Detailed Explanation & Answer
Speeds = 2a, a
So
324/(2a+a) + 324/(2a-a) = 72
Solve, a = 6
So speed of stream is 6 km/hr and speed of boat is 12 km/hr
So difference in time = 324/(12-6) – 324/(12+6) = 54 – 18 = 36 hours

Hence, option 1 is the correct answer.
गति = 2ए, ए
इसलिए
324/(2ए+ए) + 324/(2ए-ए) = 72
हल करें, ए = 6
तो धारा की गति 6 किमी/घंटा है और नाव की गति 12 किमी/घंटा है
अतः समय में अंतर = 324/(12-6) – 324/(12+6) = 54 – 18 = 36 घंटे

अतः, विकल्प 1 सही उत्तर है।
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