alleryমীনা 18 দিনে একটি বেড়া রং করতে পারে এবং গীতা 9 দিনে করতে পারে। তারা একসাথে কাজ করলে বেড়াটির কাজ শেষ হবে
A5 দিন
B6 দিন
C7 দিন
D8 দিন
Answer & Solution
Correct answer: B. 6 দিন
একসাথে তাঁরা প্রতিদিন বেড়াটির 1/18 + 1/9 = 3/18 = 1/6 অংশ রং করেন, সুতরাং 6 দিন।
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