Subject
Quantitative Aptitude
Topic
Unitary Method
A can do a work in 15 days and B in 20 days. I they work on it together for 4 days, then the fraction of the work that is left is -
A can do a work in 15 days and B in 20 days. I they work on it together for 4 days, then the fraction of the work that is left is -
ক)
1/4খ)
1/8গ)
1/15ঘ)
8/15Explanation
প্রশ্নে বলা হচ্ছে, A একটি কাজ করে ১৫ দিনে এবং B করে ২০ দিনে। তারা একত্রে ৪ দিন কাজ করলো। কতটুকু কাজ বাকি থাকবে? A এর 1 দিনের কাজ 1/15 এবং B এর 1 দিনের কাজ 1/20 ∴ দুজনে একত্রে 1দিনে করে = (1/15 + 1/20 ) = 4 + 3/60 = 7/60 ∴ দুজনে একত্রে 4 দিনে করে = 7 x 4/60 = 7/15 ∴ কাজ বাকি থাকবে = (1 - 7/15 = 15 - 7/15 = 8/15Related questions
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