Quantitative Aptitude: Time and Work Set 19

  1. Person 1 is thrice as good a workman as person 2 and so takes 30 days less than person 2 for doing a job. Calculate the time in which they can do the job together is.
    11 1/4
    12
    11
    12 1/2
    20
    Option A
    Let person 1 can finish the whole work in x days.
    Person 2 can finish the same work in 3x days.
    then 3x-x= 2x= 30
     x= 15 days
     Person 1 can finish the work in 15 days.
     Person 2 can finish in 45 days.
     A+B work = 1/15 + 1/45 = 4/45
     A+B can finish the work in 45/4 = 11 ¼ days

     

  2. 32 men and 24 women together can complete a work in 16 days. 40 men can complete the same work in 32 days.How many days will 32 women can complete the same work ?
    10
    12
    15
    20
    18
    Option D
    (32 M + 24 W)* 16= 40 M * 32
    = 40M * 16 * 2
    32M + 24W = 80M
    24W =48M
    1W=2M——-1
    32W=64M—–2
    Now 40 men complete the work in 32 days.
    So 64 men complete the same work in 32* 40 / 64 = 20 days.
    Hence 32 women complete the same work in 20 days.

     

  3. Four examiners can examine a certain number of answer papers in 10 days by working for 5 a day. for how many hours in a day would 2 examiners have to work in order to examine twice the number of answer papers in 20 days?
    10
    15
    20
    25
    12
    Option A
    M1 * D1* H1 / W1 = M2 * D2* H2 / W2
    M1 = 4 D1= 10 H1= 5
    W1 = 1 M2 =2 D2 = 20
    H2 = ? W2= 2
    4*10 *5/1 = 2* 20 *H2/2
    =>H2= 10h

     

  4. 2 boys and 3 girls together or 4 boys can complete a piece of work in 20 days. 3 boys and 3 girls will complete the same work in how many days?
    15
    16
    17
    18
    19
    Option B
    2 boys + 3 girls= 4 boys
    =>2 boys = 3 girls
    =>3 boys + 3 girls = 5 boys ( 3 girls= 2 boys)
    M1D1= M2D2
    =>4* 20 = 5 *D2
    D2 = 16 days.

     

  5. Varun gets Rs. 700 for every day that the works. If he runs Rs.19600 in a month of 62 days, for how many days did he work?
    21
    20
    23
    28
    25
    Option D
    Varun gets Rs.700 for 1 day of work
    Amount received by varun for 62 days.
    Number of days Varun worked in a month = 19600/ 700 =28 days.

     

  6. Person A and Person B can complete a piece of work in 30days and 20 days respectively. Then contracted to complete the work for Rs. 60,000.The share of Person A in the contracted money will be
    24,000
    25,000
    20,000
    19,000
    26,000
    Option A
    Total amount = Rs.60,000
    Person A’s 1 day work = 1/30
    Person B’s 1 day work =1/20
    Ratio = 1/30 : 1/20 = 2:3
    Sum of the ratio = 2+3 = 5
    Person A’ s share = 2/5 * 60,000 = Rs.24,000

     

  7. There are n number of workers can finish a project work in 15 days. If there are 3 workers could be finished in 5 days less. the original number of workers are:
    3
    5
    7
    4
    6
    Option E
    M1M2=M2D2
    n*15 = ( n+3) * 10
    n=6

     

  8. 84 women can do a piece of work in 36 days. How many women are required to complete the same work in 42 days?
    72
    36
    78
    44
    67
    Option A
    84 women – 36 days
    1 women–84 * 36 days
    Number of women required = 84 * 36/42 = 72 women

     

  9. Person A earns Rs. 250 in 16 days and person B earns Rs.280 in 20 days. what is the ratio of their earnings?
    25:112
    12:112
    120:112
    125:112
    125:110
    Option D
    Required ratio = 250/16 : 280/ 20
    =5000:4480
    =125:112

     

  10. Hasini and her daughter received Rs. 800 as wages for 5 days work. Hasini’s work was three times more efficiency han her daughter. Then what is the daily wage of her daughter?
    35
    40
    45
    55
    65
    Option B
    Hasini: daughter = 3:1
    daughter share = ¼ * 800 = Rs.200
    So daily wage = 200/ 5 = Rs.40

     

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