RRB Technician Grade 3 practice question
Rohit can complete a piece of work in 21 days and Priya can complete the same work in 19 days. Working together, in how many days will they complete the work?
From a RRB Technician Grade 3 Reasoning practice set · Reasoning
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Correct answer: (B) 9.98 days
Rohit's 1-day work = 1/21; Priya's 1-day work = 1/19. Together, 1-day work = 1/21 + 1/19 = 399/40. So time taken = 40/399 = 9.98 days.
हिंदी में प्रश्न
Rohit एक काम को 21 दिनों में पूरा कर सकता है और Priya उसी काम को 19 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: (B) 9.98 days
Rohit का 1 दिन का काम = 1/21; Priya का 1 दिन का काम = 1/19। दोनों मिलकर 1 दिन का काम = 1/21 + 1/19 = 399/40। अतः समय = 40/399 = 9.98 days।
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