100+ Time and Work Aptitude Questions and Answers Pdf - 1

 Question: 1

A, B and C together earn Rs. 300 per day, while A and C together earn Rs. 188 and B and C together earn Rs. 152. The daily earning of C is

(A) Rs. 20

(B) Rs. 40

(C) Rs. 68

(D) Rs. 112

View Answer

Ans: B

B’s daily earning = Rs. (300 - 188) = Rs. 112.

A’s daily earning = Rs. (300 - 152) = Rs. 148.

C’s daily earning = Rs. [(300 – (112 + 148)] = Rs. 40.

Question: 2

Ronald and Elan are working on an assignment. Ronald takes 6 hours to type 32 pages on a computer, while Elan takes 5 hours to type 40 pages. How much time will they take, working together on two different computers to type an assignment of 110 pages?

(A) 7 hours

(B) 7 hours 30 minutes

(C) 8 hours

(D) 8 hours 15 minutes

View Answer

Ans: D

Number of pages typed by Ronald in 1 hour = 

32

6

 = 

16

3

.

Number of pages typed by Elan in 1 hour = 

40

5

 = 8.

Number of pages typed by both in 1 hour = (

16

3

+8) = 

40

3

.

∴ Time taken by both to type 110 pages

= (110×

3

40

)hrs = 8

1

4

hrs = 8 hrs 15 min.

Question: 3

A job can be done by 3 skilled worksmen in 20 days or by 5 boys in 30 days. How many will they take if they work together?

(A) 8 days

(B) 10 days

(C) 12 days

(D) 14 days

View Answer

Ans: C

3 men’s 1 day’s work = 

1

20

5 boys 1 day’s work = 

1

30

(3 men + 5 boys) 1 day’s work = (

1

20

+

1

30

) = 

5

60

 = 

1

12

.

∴ 3 men and 5 boys will complete the work in 12 days.

Question: 4

Reena, Aastha and Shloka can independently complete a piece of work in 6 hours, 4 hours and 12 hours respectively. If they work together, how much time will they take to complete that piece of work?

(A) 2 hours

(B) 4 hours

(C) 6 hours

(D) 8 hours

View Answer

Ans: A

Reena’s 1 hour’s work = 

1

6

Aastha’s 1 hour’s work = 

1

4

Shloka’s 1 hour’s work = 

1

12

(Reena + Aastha + Shloka)’s 1 hour’s work

= 

1

4

 + 

1

6

 + 

1

12

 = 

6

12

 = 

1

2

.

Hence Reena, Aastha and Shloka together take 2 hours to complete the work.

Question: 5

A man, a woman and a boy can do a piece of work in 6, 9 and 18 days respectively. How many boys must assist one man and one woman to do the work in 1 day?

(A) 6

(B) 9

(C) 13

(D) 17

View Answer

Ans: C

(1 man + 1 woman)’s 1 day’s work = 

1

6

 + 

1

9

 = 

5

18

.

Remaining work = (1–

5

18

) = 

13

18

Work done by 1 boy in day = 

1

18

.

∴ Number of boys required = (

13

18

×18) = 13.