RRB ALP practice question
A painter can paint a house in 20 days, working alone at a constant daily rate. Since he completes 1/20 of the work each day, in how many days will he paint exactly 3/4 of the house?
From a RRB ALP Quantitative Aptitude practice set · Quantitative Aptitude
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Correct answer: (A) 15 days
His daily work rate is the reciprocal 1/20 of the total work. To complete 3/4 of the work, required days = (3/4) × 20 = 60/4 = 15 days.
हिंदी में प्रश्न
एक पेंटर एक घर को 20 दिनों में पूरा पेंट कर सकता है। बताइए उसे घर के 3/4 हिस्से को पेंट करने में कितने दिन लगेंगे। (वह प्रतिदिन एक स्थिर दर से 1/20 भाग पूरा करता है)।
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सही उत्तर: (A) 15 दिन
उसकी प्रतिदिन कार्य दर कुल कार्य का व्युत्क्रम 1/20 है। कार्य के 3/4 भाग को पूरा करने के लिए आवश्यक दिन = (3/4) × 20 = 60/4 = 15 दिन।
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