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Combined ratio of efficiency of (A + B), (B + C) and (A + C) is: A + B B + C A + C 4 5 5 7 -------------------------------------------------- 4k : 5k : 7k (Where K is a constant) A + B + B + C + A + C = 2(A + B + C) and 2(A + B + C) = 16k A + B + C = 8 k Note that combined efficiency of (A + B + C) is twice of the efficiency of (A + B). [Since, 8 = 4 × 2] Therefore, A and B working together will finish the work in (40 × 8)/4 days (40 × (12-4))/4 days 40 $ (12 # 4) ^ 4 days Similarly, B and C working together will finish the work in (40 × 8)/5 days (40 × (4+4))/5 Days 40 $ (4 @ 4) ^ 5 days Similarly, A and C working together will finish the work in (40 × 8)/7days (40 × (12-4))/7 Days 40 $ (12 @ 4) ^ 7 days Again, time required to finish the work by A alone (64 ×40)/ (64-40) Days 64 $ 40 ^ (64 # 40) days Since, B and C working together finish the work in 64 days while A, B and C working together finish the work in 40 days.
Read the given statement s and conclusions carefully. Assuming that the information given in the statements is true, even if it appears to be at varian...
Statement:
Only a few D are N.
No N are C
Conclusion:
I. Some D are not C
...Statements:
Some kitchen is balcony.
No balcony is room.
Some room is floor.
All floor is roof.
Conclusions:
Statement:
Some lehenga are saree.
Only a few suit are dhoti.
Only a few dhoti are hanky.
All lehenga are hanky....
Statement : All books are pens.
Some pens are desks.
No desk is a chair.
Some chairs are tables.
Conclusion:
I. So...
You have to take the given statements to be true even if they seem to be at variance with commonly known facts. Read all the conclusions and then decid...
Statements:All jackets are collars.
All collars are shirts.
All chains are shirts.
Conclusions:I. No collar is chain.
II. So...
In the question below some statements are given followed by two conclusions I and II. You have to take the given statements to be true even if they see...
Statements:
Some A are B.
Only a few B are C.
All C are D.
Only a few D are E.
Conclusions:
I). No A...
Statements:a. No copy is a pen.
b. Some pens are books
Conclusions:I. Some books are not copies
II. Some copies are not books.