RRB NTPC CBT-1 previous year question
Eduardo, Abraham and Xavier can finish a certain piece of work in 6, 34 and 36 days, respectively. All three of them started the work together. Eduardo left the work after 2 days and Abraham left just 3 days before the work was completed. Find the total number of days taken for the work to be completed.
Asked in RRB NTPC 2026 — 15 June Shift 2 · Quantitative Aptitude
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Correct answer: (D) 13.2
Rates: Eduardo 1/6, Abraham 1/34, Xavier 1/36 per day. If total time is T days, Eduardo works 2 days, Abraham works (T-3) days and Xavier works T days: 2/6+(T-3)/34+T/36=1. Solving gives 35T=462, so T=13.2 days.
हिंदी में प्रश्न
एडआर्डो, अब्राहम और ज़ेवियर एक काम को क्रमशः 6, 34 और 36 दिनों में पूरा कर सकते हैं। तीनों _ मिलकर काम करना शुरू करते हैं। एडुआर्डा 2 दिन बाद काम छोड़ देता है और अब्राहम काम पूरा होने स॑ ठीक 3 दिन पहले काम छोड़ देता है। काम पूरा होने म॑ कुल कितने दिन लगे?
उत्तर जाँचने के लिए किसी विकल्प पर टैप करें।
उत्तर और व्याख्या देखें
सही उत्तर: (D) 15.2
दरें: एडुआर्डो 1/6, अब्राहम 1/34, जेवियर 1/36 प्रतिदिन। यदि कुल समय T दिन है, तो एडुआर्डो 2 दिन, अब्राहम (T-3) दिन और जेवियर T दिन काम करता है: 2/6+(T-3)/34+T/36=1। हल करने पर 35T=462, अतः T=13.2 दिन।
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