Chain Rule - Quantitative Aptitude (MCQ) questions

1)   8 men can paint a house in 12 days. However, 12 women can paint the same house in 16 days. 16 men started painting the house. After 3 days of painting, 10 men were replaced by 4 women. Now how many days will they take to complete the remaining painting?
- Published on 03 May 17

a. 8 days
b. 10 days
c. 12 days
d. 6 days
Answer  Explanation 

ANSWER: 6 days

Explanation:
chain rule


2)   Hiralal wants to build a tank. He employed 7 workers to do the work. It was expected to get completed in 12 days. 5 days after starting the work, 2 workers were fired by him. Remaining workers will take how much time to complete the work?
- Published on 03 May 17

a. 49/5 days
b. 39/7 days
c. 25/7 days
d. 38/5 days
Answer  Explanation 

ANSWER: 49/5 days

Explanation:
chain rule


3)   James hired some workers to build his house in 20 days. But on the day of starting of the construction, 12 men did not come. Rest of the people then built the entire house in 32 days. How many workers had he initially hired?
- Published on 03 May 17

a. 64
b. 48
c. 32
d. 24
Answer  Explanation 

ANSWER: 32

Explanation:
chain rule


4)   20 girls can paint a house in 15 days. But the same house can be painted in just 10 days by 15 boys. If 10 boys and 10 girls are asked to work together, then in how many days will they complete the painting starting from scratch?
- Published on 03 May 17

a. 30 minutes
b. 45 minutes
c. 15 minutes
d. 10 days
Answer  Explanation 

ANSWER: 10 days

Explanation:
chain rule


5)   54 toymakers can prepare 36 toys per day. Ajay wants 416 toys. How many toymakers should he employ to get the job done in 16 days?
- Published on 03 May 17

a. 43
b. 39
c. 16
d. 24
Answer  Explanation 

ANSWER: 39

Explanation:
chain rule


6)   If a tank can be build by 18 men in 28 days while working for 9 hours per day, how many hours per day do 21 men have to work for 36 days, to complete the same tank?
- Published on 12 Apr 17

a. 4
b. 5
c. 9
d. 6
Answer  Explanation 

ANSWER: 6

Explanation:
chain rule


7)   Rohan wants to build a tank in 20 days for which he hires 60 workers. After 10 days, he sees that only 30% work has been done. To speed up the process and get the tank built in stipulated time, how many workers should work on the tank?
- Published on 11 Apr 17

a. 80
b. 120
c. 200
d. 140
Answer  Explanation 

ANSWER: 140

Explanation:
chain rule


8)   A fort has provision for 42 days. After 10 days, a reinforcement of 200 men arrives and the food will now last only for 24 days. How many men were there in the fort in the beginning?
- Published on 11 Apr 17

a. 600
b. 575
c. 550
d. 520
Answer  Explanation 

ANSWER: 600

Explanation:
chain rule


9)   A tank has oxygen for 72 patients and can last for 54 hours for them. If patients reduce their oxygen consumption by 10%, then 90 patients can use this oxygen supply for how many hours?
- Published on 17 Mar 17

a. 24 hours
b. 48 hours
c. 36 hours
d. 42 hours
Answer  Explanation 

ANSWER: 48 hours

Explanation:
chain rule


10)   2500 children in a school had enough chocolates for 40 days. But some children never came to school and the chocolates lasted for 50 days. How many children never came to school?
- Published on 17 Mar 17

a. 700
b. 1000
c. 400
d. 500
Answer  Explanation 

ANSWER: 500

Explanation:
chain rule


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