SSC CHSL Tier-1 previous year question
A can complete a task in 10 days, B in 15 days. A works alone for 4 days, then B joins. How many more days to finish?
Asked in SSC CHSL Tier-1 (12 Nov 2025 Shift 2) · Quantitative Aptitude
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Correct answer: (A) 3.6 days
Work done by A in 4 days = 4/10 = 2/5; remaining = 3/5. Combined rate = 1/10+1/15 = 1/6. Days needed = (3/5)/(1/6) = 3.6 days.
हिंदी में प्रश्न
A एक कार्य 10 दिनों में और B 15 दिनों में पूरा कर सकता है। A 4 दिन अके ले काम करता है, फिर B जुड़ता है। कार्य पूरा करने में और कितने दिन लगेंगे?
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उत्तर और व्याख्या देखें
सही उत्तर: (A) 3.6 दिन
A द्वारा 4 दिनों में कार्य = 4/10 = 2/5; शेष = 3/5। संयुक्त दर = 1/10+1/15 = 1/6। दिन चाहिए = (3/5)/(1/6) = 3.6 दिन।
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