alleryP এবং Q একসাথে 6 দিনে একটি শেড তৈরি করে। P-এর একার 10 দিন প্রয়োজন। Q-এর একার প্রয়োজন
A18 দিন
B12 দিন
C15 দিন
D20 দিন
Answer & Solution
Correct answer: C. 15 দিন
Q-এর কাজের হার হলো 1/6 - 1/10 = 4/60 = 1/15, তাই 15 দিন।
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