SSC CGL Tier-II practice question
Arjun can complete a piece of work in 19 days and Rohit can complete the same work in 21 days. Working together, in how many days will they complete the work?
From a SSC CGL Tier-II Reasoning practice set · Reasoning
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Correct answer: (D) 9.98 days
Arjun's 1-day work = 1/19; Rohit's 1-day work = 1/21. Together, 1-day work = 1/19 + 1/21 = 399/40. So time taken = 40/399 = 9.98 days.
हिंदी में प्रश्न
Arjun एक काम को 19 दिनों में पूरा कर सकता है और Rohit उसी काम को 21 दिनों में पूरा कर सकता है। दोनों मिलकर काम करें तो वे काम कितने दिनों में पूरा करेंगे?
उत्तर जाँचने के लिए किसी विकल्प पर टैप करें।
उत्तर और व्याख्या देखें
सही उत्तर: (D) 9.98 days
Arjun का 1 दिन का काम = 1/19; Rohit का 1 दिन का काम = 1/21। दोनों मिलकर 1 दिन का काम = 1/19 + 1/21 = 399/40। अतः समय = 40/399 = 9.98 days।
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