SSC CHSL Tier-1 practice question
16 labourers, working 5 hours a day, complete 1/4 of the work of clearing a plot of debris in 10 days. If 12 labourers are to finish the remaining work in 5 days, how many hours a day must they work?
From a SSC CHSL Tier-1 Quantitative Aptitude practice set · Quantitative Aptitude
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Correct answer: (C) 40 hours
Work of 1/4 needs 16×10×5 = 800 men-day-hours, so full work needs 3200 men-day-hours. Remaining 3/4 needs 2400 men-day-hours. So hours per day = 2400/(12×5) = 40. Hence, the correct option is "40 hours".
हिंदी में प्रश्न
16 मजदूर, प्रतिदिन 5 घंटे काम करके, मलबे से भरा भूखंड साफ़ करने के कार्य का 1/4 भाग 10 दिनों में पूरा कर देते हैं। यदि 12 मजदूर को शेष कार्य 5 दिनों में पूरा करना है, तो उन्हें प्रतिदिन कितने घंटे काम करना होगा?
उत्तर जाँचने के लिए किसी विकल्प पर टैप करें।
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सही उत्तर: (C) 40 घंटे
1/4 कार्य के लिए 16×10×5 = 800 मैन-डे-घंटे चाहिए, अतः पूरे कार्य हेतु 3200 मैन-डे-घंटे चाहिए। शेष 3/4 कार्य हेतु 2400 मैन-डे-घंटे चाहिए। अतः प्रतिदिन घंटे = 2400/(12×5) = 40। अतः सही विकल्प "40 घंटे" है।
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