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RRB NTPC Exam Arithmetic Ability Study Material

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Time And Work

15 men can complete a work in 10 days.They started the work and after 4 days 5 men left.In how many more days will the work be completed ?

a) 15
b) 9
c) 21
d) 13

✔Answer

Correct Answer Is : 9

Solution Is :

If 4 men or 6 women or 8 boys can doa work in 15 days, then in how many days 6 men,9 women and 12 boys can do the same work ?

a) 15
b) 7
c) 10
d) 12

✔Answer

Correct Answer Is : 10

Solution Is :

If 2 men , 4 women or 6 boys can do a work in 10 days working 6 hours a day. In how many days 3 men, 6 women and 8 boys can do the same work working 8 hours a day ?

a) 11× 34/5
b) 41× 19/26
c) 5× 19/26
d) 1× 19/26

✔Answer

Correct Answer Is : 1× 19/26

Solution Is :

Two pipes A and B can fill a tank in 10 and 15 hours respectively. If both pipes are opened simultaneously , then how long will it take to fill the tank ?

a) 10 hr
b) 25 hr
c) 12.5 hr
d) 6 hr

✔Answer

Correct Answer Is : 6 hr

Solution Is :

A pipe can fill a tank in 15 hours. Due to a leak at the bottom , it filled in 25 hours .If the tank is full , how much time will the leak take to empty ?

a) 40 hr
b) 30 hr
c) 12 hr
d) 37.5 hr

✔Answer

Correct Answer Is : 37.5 hr

Solution Is :

Three pipes p, Q and R can fill in 12 , 15 and 20 hours respectively. If all the pipes are opened simulteneously, then how much time will the tank get filled ?

a) 30 hr
b) 22 hr
c) 15 hr
d) 5 hr

✔Answer

Correct Answer Is : 5 hr

Solution Is :

Two pipes A and B can fill a tank in 24 minutes and 36 minutes respectively. Both the pipes are opened together .after 12 minutes , pipe A turned off.What is the total time required to fill the tank ?

a) 23 min
b) 18 min
c) 20 min
d) 15 min

✔Answer

Correct Answer Is : 18 min

Solution Is :

Two pipes P and Q can fill a tank in 40 minutes and 60 minutes respectively. If both pipes are opened simulteneously, after how much time Q should be closed to fill it completely in 28 minutes ?

a) 10 min
b) 18 min
c) 32 min
d) 20 min

✔Answer

Correct Answer Is : 18 min

Solution Is :

A is twice as good a workman as B and therefore is able to finsih a work in 30 days less than B. In how many days will they together complete the work ?

a) 30
b) 26
c) 20
d) 15

✔Answer

Correct Answer Is : 20

Solution Is :

A can do 2/5 of the work in 10 days. B can do 2/3 of the same work in 10 days. In how many day will they complete the work if they work together ?

a) 67× 3/8
b) 23× 3/8
c) 9 × 3/8
d) 12 × 3/8

✔Answer

Correct Answer Is : 9 × 3/8

Solution Is :

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RRB NTPC Exam Arithmetic Ability Study Material

Time And Work

15 men can complete a work in 10 days.They started the work and after 4 days 5 men left.In how many more days will the work be completed ?

Correct Answer Is : 9

Solution Is :

If 4 men or 6 women or 8 boys can doa work in 15 days, then in how many days 6 men,9 women and 12 boys can do the same work ?

Correct Answer Is : 10

Solution Is :

If 2 men , 4 women or 6 boys can do a work in 10 days working 6 hours a day. In how many days 3 men, 6 women and 8 boys can do the same work working 8 hours a day ?

Correct Answer Is : 1× 19/26

Solution Is :

Two pipes A and B can fill a tank in 10 and 15 hours respectively. If both pipes are opened simultaneously , then how long will it take to fill the tank ?

Correct Answer Is : 6 hr

Solution Is :

A pipe can fill a tank in 15 hours. Due to a leak at the bottom , it filled in 25 hours .If the tank is full , how much time will the leak take to empty ?

Correct Answer Is : 37.5 hr

Solution Is :

Three pipes p, Q and R can fill in 12 , 15 and 20 hours respectively. If all the pipes are opened simulteneously, then how much time will the tank get filled ?

Correct Answer Is : 5 hr

Solution Is :

Two pipes A and B can fill a tank in 24 minutes and 36 minutes respectively. Both the pipes are opened together .after 12 minutes , pipe A turned off.What is the total time required to fill the tank ?

Correct Answer Is : 18 min

Solution Is :

Two pipes P and Q can fill a tank in 40 minutes and 60 minutes respectively. If both pipes are opened simulteneously, after how much time Q should be closed to fill it completely in 28 minutes ?

Correct Answer Is : 18 min

Solution Is :

A is twice as good a workman as B and therefore is able to finsih a work in 30 days less than B. In how many days will they together complete the work ?

Correct Answer Is : 20

Solution Is :

A can do 2/5 of the work in 10 days. B can do 2/3 of the same work in 10 days. In how many day will they complete the work if they work together ?

Correct Answer Is : 9 × 3/8

Solution Is :

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