Chain Rule MCQ Set 4

Showing question 16 to 20 of total 30 MCQs

Solve the question on your notebook and check it by clicking (Answer and Explanation) below question.

Question No: 16

A fort had provision of food for 150 men for 45 days. After 10 days, 25 men left the fort. The number of days for which the remaining food will last, is:

1. 1/4
2. 1/5
3. 42
4. 54

Answer: C

Explanation

After 10 days : 150 men had food for 35 days.

Suppose 125 men had food for x days.

Now, Less men, More days (Indirect Proportion)

Question No: 17

39 persons can repair a road in 12 days, working 5 hours a day. In how many days will 30 persons, working 6 hours a day, complete the work?

1. 10
2. 13
3. 14
4. 15

Answer: B

Explanation

Let the required number of days be x.

Less persons, More days (Indirect Proportion)

More working hours per day, Less days (Indirect Proportion)

Question No: 18

A man completes 5/8 of a job in 10 days. At this rate, how many more days will it takes him to finish the job?

1. 5
2. 6
3. 7
4. 8

Question No: 19

In a dairy farm, 40 cows eat 40 bags of husk in 40 days. In how many days one cow will eat one bag of husk?

1. 1
2. 1/40
3. 40
4. 50

Question No: 20

A wheel that has 6 cogs is meshed with a larger wheel of 14 cogs. When the smaller wheel has made 21 revolutions, then the number of revolutions mad by the larger wheel is:

1. 4
2. 9
3. 12
4. 49

Answer: B

Explanation

Let the required number of revolutions made by larger wheel be x.

Then, More cogs, Less revolutions (Indirect Proportion)

14 : 6 :: 21 : x ⇔ 14 x x = 6 x 21