Working individually, A takes 18 days,
B takes 20 days and C takes 30
days to complete a work. If B and C
were engaged for first 2 days, in how
many days the rest of the work shall
be completed by engaging A alone ?
(1) 12 (2) 13
(3). 14. (4) 15
(5) 16
Answers
Answered by
2
Answer:
answer (4) 15
Step-by-step explanation:
A = 18 days
B = 20 days
C = 30 days
total work = LCM of 18, 20, 30
= 180
A's efficiency = 180/18 = 10
B's efficiency = 180/20 = 9
C's efficiency = 180/30 = 6
2 days for B+C = (9+6)*2
= 30
rest work = 180 - 30
= 150
A take time to complete the work = 150/10 = 15 days
Answered by
0
15 days A will take to engage
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