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RRB NTPC Exam Arithmetic Ability Study Material

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Time And Work

If A can do a work in 10 days and B can do the same work in 15 days , then in how many days can they complete the work working together ?

a) 23
b) 6
c) 7/50
d) 15

✔Answer

Correct Answer Is : 6

Solution Is :

If A can do a work in 10 days and B can do its in 20days and C can do its in 30days , then in how many days B can complete double of this work ?

a) 5 × 6/11
b) 15/7
c) 8
d) 60/11

✔Answer

Correct Answer Is : 60/11

Solution Is :

A does three- fourth of the work as B does in half of the time.If together they take 12 days to complete the work, how much time shall B take to do it ?

a) 30
b) 24
c) 18
d) 36

✔Answer

Correct Answer Is : 30

Solution Is :

A does a work in 10days and B does the same work in 15 days.They started working together alternately starting with A. In how many days will the work be completed ?

a) 11
b) 8
c) 12
d) 10

✔Answer

Correct Answer Is : 12

Solution Is :

A , B and C together can complete a work in 10 days. A and C together can complete this work in 15 days and B and C can complete the same work in 20 days.Find the ratio of wages A , B and C.

a) 3 : 1 : 2
b) 2 : 1: 3
c) 1 : 2 : 3
d) 3 : 2 : 1

✔Answer

Correct Answer Is : 3 : 2 : 1

Solution Is :

A , B and C can do a work in 12 , 18 and 24 days respectively. They together started a work and after 3 days A left the work.After that if B and C worked for 2 days and B left the work.Rest work was completed by C alone in 6 × 1/3 days.If they get total wages 3960, find the dily wages of c.

a) 355
b) 165
c) 1870
d) 220

✔Answer

Correct Answer Is : 165

Solution Is :

A can do a work in 16 days , B in 20 days .They work for 4 days , the rest of the work was finished by C in 3 days.If they get 420 for the work,The daily wages of C is

a) 59
b) 120
c) 70
d) 77

✔Answer

Correct Answer Is : 77

Solution Is :

A alone can do a work in 12 days and B alone in 16 days .A and B with C started to do it for 1400.They complete the work in 4 days.How much is to be paid to C ?

a) 450
b) 560
c) 350
d) 600

✔Answer

Correct Answer Is : 600

Solution Is :

A and B together can complete a work in 25 days. If alone can do the same work in 30 days, then in how many days can B alone complete the double of this work ?

a) 320
b) 300
c) 265
d) 250

✔Answer

Correct Answer Is : 300

Solution Is :

A , B and C together earn 450 per day. While A and B together earn 300 and B and C together earn 350.The daily earning of B is

a) 200
b) 130
c) 100
d) 250

✔Answer

RRB NTPC Exam Arithmetic Ability Study Material

Time And Work

If A can do a work in 10 days and B can do the same work in 15 days , then in how many days can they complete the work working together ?

Correct Answer Is : 6

Solution Is :

If A can do a work in 10 days and B can do its in 20days and C can do its in 30days , then in how many days B can complete double of this work ?

Correct Answer Is : 60/11

Solution Is :

A does three- fourth of the work as B does in half of the time.If together they take 12 days to complete the work, how much time shall B take to do it ?

Correct Answer Is : 30

Solution Is :

A does a work in 10days and B does the same work in 15 days.They started working together alternately starting with A. In how many days will the work be completed ?

Correct Answer Is : 12

Solution Is :

A , B and C together can complete a work in 10 days. A and C together can complete this work in 15 days and B and C can complete the same work in 20 days.Find the ratio of wages A , B and C.

Correct Answer Is : 3 : 2 : 1

Solution Is :

A , B and C can do a work in 12 , 18 and 24 days respectively. They together started a work and after 3 days A left the work.After that if B and C worked for 2 days and B left the work.Rest work was completed by C alone in 6 × 1/3 days.If they get total wages 3960, find the dily wages of c.

Correct Answer Is : 165

Solution Is :

A can do a work in 16 days , B in 20 days .They work for 4 days , the rest of the work was finished by C in 3 days.If they get 420 for the work,The daily wages of C is

Correct Answer Is : 77

Solution Is :

A alone can do a work in 12 days and B alone in 16 days .A and B with C started to do it for 1400.They complete the work in 4 days.How much is to be paid to C ?

Correct Answer Is : 600

Solution Is :

A and B together can complete a work in 25 days. If alone can do the same work in 30 days, then in how many days can B alone complete the double of this work ?

Correct Answer Is : 300

Solution Is :

A , B and C together earn 450 per day. While A and B together earn 300 and B and C together earn 350.The daily earning of B is

Correct Answer Is : 200

Solution Is :

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