Rumi and Rony can finish a task, working together, in 12 days. If Rony alone can finish that in 20 days, how many days will Rumi need to finish the task working alone ?
Created: 6 years ago |
Updated: 2 years ago
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Together the can finish 1/12 of the work in a day.
Rony alone can finish 1/20 of the work in a day.
Rumi alone can finish = 1/12 - 1/20 = (5 - 3)/60 = 1/30 of the work in a day.
So, Rumi alone can finish the work in 30 days.
Md Azizur Rahman
Founder of Satt
ঐকিক নিয়ম (Unitary Methods):
একটি জিনিসের দাম, ওজন, পরিমাণ ইত্যাদি বের করে নির্দিষ্ট সংখ্যক এই জাতীয় জিনিসের দাম, ওজন, পরিমাণ ইত্যাদি বের করার নিয়মকে ঐকিক নিয়ম বলে।
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