Mr. Ronaldo can finish a Task in 20 days and Mr. Messi can do in 30 days. With help of Mr. Salah, they did the job in 10 days only. Then how many days are necessary to complete the task by Mr. Salah?

A 80 Days
B 60
C 50 days
D 70 days

Correct Answer: 60

মনেকরি, মি. সালেহ x দিনে করতে পারে।প্রশ্ন মতে, 120 + 130 + 1x =  110⇒ 1x = 110 - 120 - 130⇒ 1x =  6 - 3 - 260⇒ 1x = 160⇒ x = 60
Bissoy MCQ
#গণিত #ঐকিক নিয়ম (Unitary method) #Janata Bank Ltd #অফিসার (ক্যাশ) - 31.10.2020

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