Aptitude - Time & Work Online Quiz



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Following quiz provides Multiple Choice Questions (MCQs) related to Simple Interest. You will have to read all the given answers and click over the correct answer. If you are not sure about the answer then you can check the answer using Show Answer button. You can use Next Quiz button to check new set of questions in the quiz.

Questions and Answers

Q 1 - A can do a bit of work in 8 hours while B along can do it in 12 hours. Both A and B cooperating can complete the work in:

A - 10 hours

B - 4 hours

C - 21/4 hours

D - 24/5 hours

Answer : D

Explanation

A's 1 hour work = 1/8, B 's 1 hour work =  1/12
(A+B)'s 1 hour work =  (1/8 +1/12) = 5/24
Hence, A and B together can finish it in 24/5 hours

Q 2 - A can do a work in 4 days, B can do it in 5 days and C can do it in 10 days. A, B and C together can take the necessary steps in

A - 8/5 days

B - 20/11 days

C - 17/6 days

D - 3 days

Answer : B

Explanation

A 1 days work=1/4, B 1 days work=1/5 and C 1 days work=1/10.
(A+B+C) 1 days work= (1/4+1/5+1/10) = (5+4+2)/2=11/20.
∴A, B, C together can do it in 20/11 days,i.e.20/11days.

Q 3 - A can do 1/3 of a work in 5 days and B can do 2/5 of the work in 10 days. In how long both A and B together can take the necessary steps?

A - 31/4 days

B - 44/5 days

C - 75/8 days

D - 10 days

Answer : C

Explanation

1/3 work is done by A in 5 days.
Whole work will be done by A in 15 days.
2/5 work is done by B in 10 days.
Whole work will be done by B in (10*5/2) day?s i.e 25 days
(A+B) 's 1 days work = (1/15+1/25) = 8/75
∴A and B can do the work in 75/8 days

Q 4 - A can make a sure showing in 25 days which B alone can do in 20 days. A began the work and was joined by B following 10 days. The work went on for

A - 25/2 days

B - 128/9 days

C - 15 days

D - 50/3 days

Answer : D

Explanation

A's 10 days work = (1/25*10)= 2/5 ; remaining work = (1-2/5) = 3/5
(A+B)'s 1 day work = (1/25+1/20) = 9/100
9/100 work is finished by (A+B) In 1 day.
3/5 work is finished by (A+B) in (100/9* 3/5) days = 20/3 days
Total time taken = (10+ 20/3) = 50/3 days

Q 5 - Aand B can finish a bit of work in 12 days and 18 days separately. A starts to take every necessary step and they work on the other hand each one in turn for one day each. The entire work will be finished in

A - 43/3 days

B - 47/3 days

C - 49/3 days

D - 56/3 days

Answer : A

Explanation

Working on alternate day s(A+B) 's 2 days work = (1/12+1/18)= 5/36
(A+B) 2 days work = 5/36
(A+B)'s 14 days work = (5/36*7) = 35/36 ; remaining work = (1-35/36)= 1/36
Now it is A's turn.
1/12 work is done by A in 1 day.
1/36 work is done by A in (12* 1/36) day = 1/3 day
Total time taken = 43/3 days

Q 6 - 9 men working 7 hours a day can finish a bit of work in 15 days. In how long can 6 men functioning for 9 hours a day, complete the same bit of work?

A - 63/4 days

B - 16 days

C - 67/4 days

D - 35/2 days

Answer : D

Explanation

(9*7) men working 1 hr a day can finish the work in 15 days.
63 men finish it in 15 days.
1 man can finish it in (15*63) days.
(6*9) men can finish it in (15*63)/ (6*9) days = 35/2 days

Q 7 - 10 ladies can finish a work in 8 days and 10 youngsters take 12 days to finish the work. How long will 6 ladies and 3 kids together take to finish the work?

A - 7

B - 10

C - 9

D - 12

Answer : B

Explanation

10 women 1 days work =1/8 ⇒1 women 1 day work = 1/80
10 children 1 day work = 1/12 ⇒1 children 1 day work = 1/120
(6 women + 3 children) 1 day work = (6/80 +3/120) = (3/40+ 1/40) = 4/40 = 1/10
So, they can finish the work in 10 days.

Q 8 - 8 kids and 12 men finish a sure bit of work in 9 days. In the event that every youngster takes double the time taken by a men to complete the work, in how long will 12 men complete the same work?

A - 8 days

B - 15 days

C - 9 days

D - 12 days

Answer : D

Explanation

2 children = 1 man
∴ (8 children + 12 man) = 16 men
Let the required number of days be x.
Less man, more days
12: 16:: 9: x ⇒x = 16*9/12 = 12 days

Q 9 - Two man embrace to do a bit of work for Rs. 4000. One alone can do it in 6 days, the other in 8 days. With the assistance of a kid, they complete it in 3 days. The young men offer is:

A - 400

B - 500

C - 600

D - 800

Answer : B

Explanation

Let the men be A and B and the boy be C.
A's 1 days work = 1/6, B's 1 day work = 1/8. (A+B+C)'s 1 day work = 1/3
1/6 + 1/8 +1/x = 1/3 ⇒1/x = (1/3- 7/24) = 1/24
Ratio of shares of A, B, C = 1/6: 1/8: 1/24 = 4:3:1
Boys share = (4000*1/8) = RS. 500

Q 10 - A works twice as quick as B. On the off chance that the two can together complete a bit of work in 12 days, then B alone can do it in

A - 24 days

B - 27 days

C - 36 days

D - 48 days

Answer : C

Explanation

Let B 1 day work =x. Then , A 1 days work=2x
X+2x=1/12⇒3x=1/12⇒x=1/36.
B 1 day work=1/36.
Hence B alone can finish the work in 36 days.


aptitude_time_work.htm

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