alleryP, Q-এর চেয়ে তিনগুণ দ্রুত কাজ করে, এবং P একা Q-এর চেয়ে 20 দিন আগে কাজ শেষ করে। P-এর একা প্রয়োজন
A30 দিন
B20 দিন
C15 দিন
D10 দিন
Answer & Solution
Correct answer: D. 10 দিন
Q-এর সময় লাগে P-এর সময়ের তিনগুণ, তাই 3t - t = 20 থেকে পাওয়া যায় P-এর জন্য t = 10 দিন।
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