12 ആളുകൾ 10 ദിവസം കൊണ്ട് തീർക്കുന്ന ഒരു ജോലി 15 ആളുകൾ എത്ര കൊണ്ട് ചെയ്തു തീർക്കും?
A5
B8
C9
D6
Answer:
B. 8
Read Explanation:
To find the number of days needed:
Step 1: Calculate the total work done by 12 persons in 1 day
Total work = 1 work
12 persons can complete the work in 10 days, so:
12 persons can complete 1/10 of the work in 1 day
Step 2: Calculate the work done by 1 person in 1 day
Work done by 1 person in 1 day = (1/10) / 12 = 1/120
Step 3: Calculate the work done by 15 persons in 1 day
Work done by 15 persons in 1 day = 15 × (1/120) = 1/8
Step 4: Calculate the number of days needed to complete the work by 15 persons
Number of days = Total work / Work done by 15 persons in 1 day
= 1 / (1/8)
= 8
So, the number of days needed to complete the same work by 15 persons is:
8