alleryP की कार्यक्षमता Q से तीन गुना है, और वे दोनों मिलकर किसी कार्य को 15 दिनों में पूरा करते हैं। P को अकेले यह कार्य पूरा करने में कितना समय लगेगा?
A30 दिन
B20 दिन
C15 दिन
D45 दिन
Answer & Solution
Correct answer: B. 20 दिन
दरें 3x और x होने पर, 4x = 1/15 जिससे x = 1/60 प्राप्त होता है, और P की दर 3/60 = 1/20 होने के कारण उसे अकेले 20 दिन लगेंगे।
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