A can do a task in the same amount of time as B and C combined. If A and B could accomplish it in 10 days and C alone could do it in 50 days, B could do it in:
A. 15 days
B. 20 days
C. 25 days
D. 30 days
Answer:C
A can do a task in the same amount of time as B and C combined. If A and B could accomplish it in 10 days and C alone could do it in 50 days, B could do it in:
A. 15 days B. 20 days C. 25 days D. 30 days
Explanation: 1 day's labour for (A + B) = 1/10 10 C's 1 day's work = 1/50 51 day's labour for (A + B + C) = 1/10 + 1/50 = 6/50 = 3/25. (i)1 day's work for A = 1 day's labour for (B + C)... (ii)We obtain 2 x (A's 1 day's work) = 3/25 from I and (ii).1 day's work for A Equals 3/50.1 day's labour for B.1/10 - 3/50 = 2/50 = 1/25 .As a result, B could complete the task in 25 days on his own.