Problems on Ages
Problems on Ages - 1 Problems on Ages - 2 Problems on Ages - 3 Problems on Ages - 4Problems on Average
Problems on Average - 1 Problems on Average - 2 Problems on Average - 3Odd Man Out Series
Odd Man Out Series - 1 Odd Man Out Series - 2 Odd Man Out Series - 3 Odd Man Out Series - 4Problems on Percentage
Problems on Percentage - 1 Problems on Percentage - 2 Problems on Percentage - 3 Problems on Percentage - 4 Problems on Percentage - 5Permutation and Combination
Permutation and Combination - 1 Permutation and Combination - 2 Permutation and Combination - 3Problems on Probability
Problems on Probability - 1 Problems on Probability - 2 Problems on Probability - 3 Problems on Probability - 4Problems on Profit Loss
Profit and Loss - 1 Profit and Loss - 2 Profit and Loss - 3 Profit and Loss - 4 Profit and Loss - 5 Profit and Loss - 6Problems on Test Divisibility
Test Divisibility - 1 Test Divisibility - 2 Test Divisibility - 3Time and Work
Time and Work - 1 Time and Work - 2 Time and Work - 3The ones who are crazy enough to think they can change the world are the ones who do.- Steve Jobs
Tricy Interview Questions on Time and Work
Time and Work - Aptitude
11.A and B can do a work in 12 days, B and C in 15 days, C and A in 20 days. If A, B and C work together, they will complete the work in:
x
Option: B
Explanation
(A + B)'s 1 day's work = 1/12
(B + C)'s 1 day's work = 1/15
(A + C)'s 1 day's work = 1/20
adding we get: 2(A + B + C)'s 1 day's work = (1/12) + (1/15) + (1/20) = 12/60 = 1/5
(A + B + C)'s 1 day's work = 1/10
so, A, B, and C together can complete the work in 10 days
12.A works twice as fast as B. If B can complete a work in 12 days independently the number of days in which A and B can together finish the work is:
x
Option:C
Explanation
ratio of rates of working of A and B = 2:1. so, ratio of times taken = 1:2
A's 1 day's work = 1/6
B's 1 day's work = 1/12
(A + B)'s 1 day's work = (1/6) + (1/12) = 3/12 = 1/4
so, A and B together can finish the work in 4 days
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